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Finding the Fourth Proportional to 910, 1,255.82 and 517.08

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Solution

The fourth proportional to 910, 1,255.82 and 517.08 is: 713.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    910 : 1,255.82 = 517.08 : x
  2. Step 2: Convert to fraction form
    910/1,255.82 = 517.08/x
  3. Step 3: Cross multiply
    910x = 1,255.82 × 517.08
  4. Step 4: Simplify right side
    910x = 649,359.41
  5. Step 5: Solve for x
    x = 649,359.41/910
  6. Step 6: Final answer
    x = 713.58

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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.