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Finding the Fourth Proportional to 1,134.52, 1,566.03 and 715.58

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Solution

The fourth proportional to 1,134.52, 1,566.03 and 715.58 is: 987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.52 : 1,566.03 = 715.58 : x
  2. Step 2: Convert to fraction form
    1,134.52/1,566.03 = 715.58/x
  3. Step 3: Cross multiply
    1,134.52x = 1,566.03 × 715.58
  4. Step 4: Simplify right side
    1,134.52x = 1,120,619.75
  5. Step 5: Solve for x
    x = 1,120,619.75/1,134.52
  6. Step 6: Final answer
    x = 987.75

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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.