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Finding the Fourth Proportional to 285,452.48, 428,162.28 and 85,768.64

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Solution

The fourth proportional to 285,452.48, 428,162.28 and 85,768.64 is: 128,648.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,452.48 : 428,162.28 = 85,768.64 : x
  2. Step 2: Convert to fraction form
    285,452.48/428,162.28 = 85,768.64/x
  3. Step 3: Cross multiply
    285,452.48x = 428,162.28 × 85,768.64
  4. Step 4: Simplify right side
    285,452.48x = 36,722,896,454.90
  5. Step 5: Solve for x
    x = 36,722,896,454.90/285,452.48
  6. Step 6: Final answer
    x = 128,648.02

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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.