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Finding the Fourth Proportional to 717.60, 1,071.12 and 635.52

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Solution

The fourth proportional to 717.60, 1,071.12 and 635.52 is: 948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.60 : 1,071.12 = 635.52 : x
  2. Step 2: Convert to fraction form
    717.60/1,071.12 = 635.52/x
  3. Step 3: Cross multiply
    717.60x = 1,071.12 × 635.52
  4. Step 4: Simplify right side
    717.60x = 680,718.18
  5. Step 5: Solve for x
    x = 680,718.18/717.60
  6. Step 6: Final answer
    x = 948.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.