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Finding the Fourth Proportional to 285,607.64, 428,422.26 and 85,956.42

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Solution

The fourth proportional to 285,607.64, 428,422.26 and 85,956.42 is: 128,937.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,607.64 : 428,422.26 = 85,956.42 : x
  2. Step 2: Convert to fraction form
    285,607.64/428,422.26 = 85,956.42/x
  3. Step 3: Cross multiply
    285,607.64x = 428,422.26 × 85,956.42
  4. Step 4: Simplify right side
    285,607.64x = 36,825,643,717.91
  5. Step 5: Solve for x
    x = 36,825,643,717.91/285,607.64
  6. Step 6: Final answer
    x = 128,937.88

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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.