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Finding the Fourth Proportional to 717.12, 1,077.17 and 522.72

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Solution

The fourth proportional to 717.12, 1,077.17 and 522.72 is: 785.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.12 : 1,077.17 = 522.72 : x
  2. Step 2: Convert to fraction form
    717.12/1,077.17 = 522.72/x
  3. Step 3: Cross multiply
    717.12x = 1,077.17 × 522.72
  4. Step 4: Simplify right side
    717.12x = 563,055.69
  5. Step 5: Solve for x
    x = 563,055.69/717.12
  6. Step 6: Final answer
    x = 785.16

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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.