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Finding the Fourth Proportional to 647,545.30, 971,317.95 and 643,398.10

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Solution

The fourth proportional to 647,545.30, 971,317.95 and 643,398.10 is: 965,097.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,545.30 : 971,317.95 = 643,398.10 : x
  2. Step 2: Convert to fraction form
    647,545.30/971,317.95 = 643,398.10/x
  3. Step 3: Cross multiply
    647,545.30x = 971,317.95 × 643,398.10
  4. Step 4: Simplify right side
    647,545.30x = 624,944,123,525.90
  5. Step 5: Solve for x
    x = 624,944,123,525.90/647,545.30
  6. Step 6: Final answer
    x = 965,097.15

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Double scale
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Similar ratio
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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.