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Finding the Fourth Proportional to 363,833.28, 545,731.70 and 139,301.28

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Solution

The fourth proportional to 363,833.28, 545,731.70 and 139,301.28 is: 208,944.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,833.28 : 545,731.70 = 139,301.28 : x
  2. Step 2: Convert to fraction form
    363,833.28/545,731.70 = 139,301.28/x
  3. Step 3: Cross multiply
    363,833.28x = 545,731.70 × 139,301.28
  4. Step 4: Simplify right side
    363,833.28x = 76,021,123,650.07
  5. Step 5: Solve for x
    x = 76,021,123,650.07/363,833.28
  6. Step 6: Final answer
    x = 208,944.94

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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.