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Finding the Fourth Proportional to 402,419.91, 555,369.56 and 249,487.86

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Solution

The fourth proportional to 402,419.91, 555,369.56 and 249,487.86 is: 344,311.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,419.91 : 555,369.56 = 249,487.86 : x
  2. Step 2: Convert to fraction form
    402,419.91/555,369.56 = 249,487.86/x
  3. Step 3: Cross multiply
    402,419.91x = 555,369.56 × 249,487.86
  4. Step 4: Simplify right side
    402,419.91x = 138,557,966,207.69
  5. Step 5: Solve for x
    x = 138,557,966,207.69/402,419.91
  6. Step 6: Final answer
    x = 344,311.90

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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.