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Finding the Fourth Proportional to 404,854.56, 606,875.42 and 138,432.87

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Solution

The fourth proportional to 404,854.56, 606,875.42 and 138,432.87 is: 207,510.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,854.56 : 606,875.42 = 138,432.87 : x
  2. Step 2: Convert to fraction form
    404,854.56/606,875.42 = 138,432.87/x
  3. Step 3: Cross multiply
    404,854.56x = 606,875.42 × 138,432.87
  4. Step 4: Simplify right side
    404,854.56x = 84,011,506,469.14
  5. Step 5: Solve for x
    x = 84,011,506,469.14/404,854.56
  6. Step 6: Final answer
    x = 207,510.34

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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.