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Finding the Fourth Proportional to 1,087.77, 1,500.13 and 714.61

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Solution

The fourth proportional to 1,087.77, 1,500.13 and 714.61 is: 985.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.77 : 1,500.13 = 714.61 : x
  2. Step 2: Convert to fraction form
    1,087.77/1,500.13 = 714.61/x
  3. Step 3: Cross multiply
    1,087.77x = 1,500.13 × 714.61
  4. Step 4: Simplify right side
    1,087.77x = 1,072,007.90
  5. Step 5: Solve for x
    x = 1,072,007.90/1,087.77
  6. Step 6: Final answer
    x = 985.51

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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.