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Finding the Fourth Proportional to 747.17, 1,117.65 and 571.91

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Solution

The fourth proportional to 747.17, 1,117.65 and 571.91 is: 855.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.17 : 1,117.65 = 571.91 : x
  2. Step 2: Convert to fraction form
    747.17/1,117.65 = 571.91/x
  3. Step 3: Cross multiply
    747.17x = 1,117.65 × 571.91
  4. Step 4: Simplify right side
    747.17x = 639,194.84
  5. Step 5: Solve for x
    x = 639,194.84/747.17
  6. Step 6: Final answer
    x = 855.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.