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Finding the Fourth Proportional to 387,311.64, 534,591.56 and 217,600.44

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Solution

The fourth proportional to 387,311.64, 534,591.56 and 217,600.44 is: 300,345.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,311.64 : 534,591.56 = 217,600.44 : x
  2. Step 2: Convert to fraction form
    387,311.64/534,591.56 = 217,600.44/x
  3. Step 3: Cross multiply
    387,311.64x = 534,591.56 × 217,600.44
  4. Step 4: Simplify right side
    387,311.64x = 116,327,359,220.29
  5. Step 5: Solve for x
    x = 116,327,359,220.29/387,311.64
  6. Step 6: Final answer
    x = 300,345.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.