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Finding the Fourth Proportional to 387,437.59, 581,140.26 and 134,775.29

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Solution

The fourth proportional to 387,437.59, 581,140.26 and 134,775.29 is: 202,157.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,437.59 : 581,140.26 = 134,775.29 : x
  2. Step 2: Convert to fraction form
    387,437.59/581,140.26 = 134,775.29/x
  3. Step 3: Cross multiply
    387,437.59x = 581,140.26 × 134,775.29
  4. Step 4: Simplify right side
    387,437.59x = 78,323,347,072.18
  5. Step 5: Solve for x
    x = 78,323,347,072.18/387,437.59
  6. Step 6: Final answer
    x = 202,157.33

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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.