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Finding the Fourth Proportional to 285,452.73, 428,162.66 and 85,768.89

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Solution

The fourth proportional to 285,452.73, 428,162.66 and 85,768.89 is: 128,648.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,452.73 : 428,162.66 = 85,768.89 : x
  2. Step 2: Convert to fraction form
    285,452.73/428,162.66 = 85,768.89/x
  3. Step 3: Cross multiply
    285,452.73x = 428,162.66 × 85,768.89
  4. Step 4: Simplify right side
    285,452.73x = 36,723,035,658.80
  5. Step 5: Solve for x
    x = 36,723,035,658.80/285,452.73
  6. Step 6: Final answer
    x = 128,648.40

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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.