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Finding the Fourth Proportional to 285,444, 428,149.53 and 85,760.10

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Solution

The fourth proportional to 285,444, 428,149.53 and 85,760.10 is: 128,635.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,444 : 428,149.53 = 85,760.10 : x
  2. Step 2: Convert to fraction form
    285,444/428,149.53 = 85,760.10/x
  3. Step 3: Cross multiply
    285,444x = 428,149.53 × 85,760.10
  4. Step 4: Simplify right side
    285,444x = 36,718,146,507.75
  5. Step 5: Solve for x
    x = 36,718,146,507.75/285,444
  6. Step 6: Final answer
    x = 128,635.20

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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.