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Finding the Fourth Proportional to 641,691.84, 963,483.96 and 357,936.78

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Solution

The fourth proportional to 641,691.84, 963,483.96 and 357,936.78 is: 537,432.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,691.84 : 963,483.96 = 357,936.78 : x
  2. Step 2: Convert to fraction form
    641,691.84/963,483.96 = 357,936.78/x
  3. Step 3: Cross multiply
    641,691.84x = 963,483.96 × 357,936.78
  4. Step 4: Simplify right side
    641,691.84x = 344,866,346,224.05
  5. Step 5: Solve for x
    x = 344,866,346,224.05/641,691.84
  6. Step 6: Final answer
    x = 537,432.96

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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.