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Finding the Fourth Proportional to 910.16, 1,255.92 and 517.16

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Solution

The fourth proportional to 910.16, 1,255.92 and 517.16 is: 713.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.16 : 1,255.92 = 517.16 : x
  2. Step 2: Convert to fraction form
    910.16/1,255.92 = 517.16/x
  3. Step 3: Cross multiply
    910.16x = 1,255.92 × 517.16
  4. Step 4: Simplify right side
    910.16x = 649,511.59
  5. Step 5: Solve for x
    x = 649,511.59/910.16
  6. Step 6: Final answer
    x = 713.62

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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.