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Finding the Fourth Proportional to 647,480.70, 971,221.05 and 579,246.30

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Solution

The fourth proportional to 647,480.70, 971,221.05 and 579,246.30 is: 868,869.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,480.70 : 971,221.05 = 579,246.30 : x
  2. Step 2: Convert to fraction form
    647,480.70/971,221.05 = 579,246.30/x
  3. Step 3: Cross multiply
    647,480.70x = 971,221.05 × 579,246.30
  4. Step 4: Simplify right side
    647,480.70x = 562,576,199,694.62
  5. Step 5: Solve for x
    x = 562,576,199,694.62/647,480.70
  6. Step 6: Final answer
    x = 868,869.45

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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.