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Finding the Fourth Proportional to 285,388.38, 428,082.57 and 75,025.98

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Solution

The fourth proportional to 285,388.38, 428,082.57 and 75,025.98 is: 112,538.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,388.38 : 428,082.57 = 75,025.98 : x
  2. Step 2: Convert to fraction form
    285,388.38/428,082.57 = 75,025.98/x
  3. Step 3: Cross multiply
    285,388.38x = 428,082.57 × 75,025.98
  4. Step 4: Simplify right side
    285,388.38x = 32,117,314,335.17
  5. Step 5: Solve for x
    x = 32,117,314,335.17/285,388.38
  6. Step 6: Final answer
    x = 112,538.97

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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.