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Finding the Fourth Proportional to 387,438.59, 581,141.76 and 134,776.29

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Solution

The fourth proportional to 387,438.59, 581,141.76 and 134,776.29 is: 202,158.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,438.59 : 581,141.76 = 134,776.29 : x
  2. Step 2: Convert to fraction form
    387,438.59/581,141.76 = 134,776.29/x
  3. Step 3: Cross multiply
    387,438.59x = 581,141.76 × 134,776.29
  4. Step 4: Simplify right side
    387,438.59x = 78,324,130,376.87
  5. Step 5: Solve for x
    x = 78,324,130,376.87/387,438.59
  6. Step 6: Final answer
    x = 202,158.83

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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.