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Finding the Fourth Proportional to 641,656,781.80, 960,827,554.71 and 442,849,523.29

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Solution

The fourth proportional to 641,656,781.80, 960,827,554.71 and 442,849,523.29 is: 663,130,253.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,656,781.80 : 960,827,554.71 = 442,849,523.29 : x
  2. Step 2: Convert to fraction form
    641,656,781.80/960,827,554.71 = 442,849,523.29/x
  3. Step 3: Cross multiply
    641,656,781.80x = 960,827,554.71 × 442,849,523.29
  4. Step 4: Simplify right side
    641,656,781.80x = 425,502,024,564,817,856
  5. Step 5: Solve for x
    x = 425,502,024,564,817,856/641,656,781.80
  6. Step 6: Final answer
    x = 663,130,253.80

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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.