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Finding the Fourth Proportional to 715.13, 987.28 and 540.17

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Solution

The fourth proportional to 715.13, 987.28 and 540.17 is: 745.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.13 : 987.28 = 540.17 : x
  2. Step 2: Convert to fraction form
    715.13/987.28 = 540.17/x
  3. Step 3: Cross multiply
    715.13x = 987.28 × 540.17
  4. Step 4: Simplify right side
    715.13x = 533,292.75
  5. Step 5: Solve for x
    x = 533,292.75/715.13
  6. Step 6: Final answer
    x = 745.73

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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.