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Finding the Fourth Proportional to 385,502.78, 531,920.03 and 249,517.86

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Solution

The fourth proportional to 385,502.78, 531,920.03 and 249,517.86 is: 344,286.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,502.78 : 531,920.03 = 249,517.86 : x
  2. Step 2: Convert to fraction form
    385,502.78/531,920.03 = 249,517.86/x
  3. Step 3: Cross multiply
    385,502.78x = 531,920.03 × 249,517.86
  4. Step 4: Simplify right side
    385,502.78x = 132,723,547,576.74
  5. Step 5: Solve for x
    x = 132,723,547,576.74/385,502.78
  6. Step 6: Final answer
    x = 344,286.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.