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Finding the Fourth Proportional to 647,468.80, 971,203.20 and 643,321.60

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Solution

The fourth proportional to 647,468.80, 971,203.20 and 643,321.60 is: 964,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,468.80 : 971,203.20 = 643,321.60 : x
  2. Step 2: Convert to fraction form
    647,468.80/971,203.20 = 643,321.60/x
  3. Step 3: Cross multiply
    647,468.80x = 971,203.20 × 643,321.60
  4. Step 4: Simplify right side
    647,468.80x = 624,795,996,549.12
  5. Step 5: Solve for x
    x = 624,795,996,549.12/647,468.80
  6. Step 6: Final answer
    x = 964,982.40

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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.