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Finding the Fourth Proportional to 1,087.92, 1,630.62 and 472.14

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Solution

The fourth proportional to 1,087.92, 1,630.62 and 472.14 is: 707.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.92 : 1,630.62 = 472.14 : x
  2. Step 2: Convert to fraction form
    1,087.92/1,630.62 = 472.14/x
  3. Step 3: Cross multiply
    1,087.92x = 1,630.62 × 472.14
  4. Step 4: Simplify right side
    1,087.92x = 769,880.93
  5. Step 5: Solve for x
    x = 769,880.93/1,087.92
  6. Step 6: Final answer
    x = 707.66

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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.