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Finding the Fourth Proportional to 1,087.73, 1,631.85 and 471.61

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Solution

The fourth proportional to 1,087.73, 1,631.85 and 471.61 is: 707.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.73 : 1,631.85 = 471.61 : x
  2. Step 2: Convert to fraction form
    1,087.73/1,631.85 = 471.61/x
  3. Step 3: Cross multiply
    1,087.73x = 1,631.85 × 471.61
  4. Step 4: Simplify right side
    1,087.73x = 769,594.42
  5. Step 5: Solve for x
    x = 769,594.42/1,087.73
  6. Step 6: Final answer
    x = 707.53

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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.