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Finding the Fourth Proportional to 522,687.79, 783,938.16 and 138,439.27

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Solution

The fourth proportional to 522,687.79, 783,938.16 and 138,439.27 is: 207,634.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,687.79 : 783,938.16 = 138,439.27 : x
  2. Step 2: Convert to fraction form
    522,687.79/783,938.16 = 138,439.27/x
  3. Step 3: Cross multiply
    522,687.79x = 783,938.16 × 138,439.27
  4. Step 4: Simplify right side
    522,687.79x = 108,527,826,595.54
  5. Step 5: Solve for x
    x = 108,527,826,595.54/522,687.79
  6. Step 6: Final answer
    x = 207,634.13

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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.