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Finding the Fourth Proportional to 715.52, 987.45 and 560

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Solution

The fourth proportional to 715.52, 987.45 and 560 is: 772.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.52 : 987.45 = 560 : x
  2. Step 2: Convert to fraction form
    715.52/987.45 = 560/x
  3. Step 3: Cross multiply
    715.52x = 987.45 × 560
  4. Step 4: Simplify right side
    715.52x = 552,972
  5. Step 5: Solve for x
    x = 552,972/715.52
  6. Step 6: Final answer
    x = 772.83

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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.