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Finding the Fourth Proportional to 387,387.98, 580,749.17 and 134,635.63

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Solution

The fourth proportional to 387,387.98, 580,749.17 and 134,635.63 is: 201,837.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,387.98 : 580,749.17 = 134,635.63 : x
  2. Step 2: Convert to fraction form
    387,387.98/580,749.17 = 134,635.63/x
  3. Step 3: Cross multiply
    387,387.98x = 580,749.17 × 134,635.63
  4. Step 4: Simplify right side
    387,387.98x = 78,189,530,374.93
  5. Step 5: Solve for x
    x = 78,189,530,374.93/387,387.98
  6. Step 6: Final answer
    x = 201,837.78

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1.5x scale

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.