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Finding the Fourth Proportional to 1,087.27, 1,499.45 and 714.12

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Solution

The fourth proportional to 1,087.27, 1,499.45 and 714.12 is: 984.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.27 : 1,499.45 = 714.12 : x
  2. Step 2: Convert to fraction form
    1,087.27/1,499.45 = 714.12/x
  3. Step 3: Cross multiply
    1,087.27x = 1,499.45 × 714.12
  4. Step 4: Simplify right side
    1,087.27x = 1,070,778.04
  5. Step 5: Solve for x
    x = 1,070,778.04/1,087.27
  6. Step 6: Final answer
    x = 984.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.