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Finding the Fourth Proportional to 647,341,324.80, 971,011,987.20 and 643,310,246.40

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Solution

The fourth proportional to 647,341,324.80, 971,011,987.20 and 643,310,246.40 is: 964,965,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,341,324.80 : 971,011,987.20 = 643,310,246.40 : x
  2. Step 2: Convert to fraction form
    647,341,324.80/971,011,987.20 = 643,310,246.40/x
  3. Step 3: Cross multiply
    647,341,324.80x = 971,011,987.20 × 643,310,246.40
  4. Step 4: Simplify right side
    647,341,324.80x = 624,661,960,742,985,600
  5. Step 5: Solve for x
    x = 624,661,960,742,985,600/647,341,324.80
  6. Step 6: Final answer
    x = 964,965,369.60

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.