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Finding the Fourth Proportional to 910, 1,255.86 and 560.52

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Solution

The fourth proportional to 910, 1,255.86 and 560.52 is: 773.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    910 : 1,255.86 = 560.52 : x
  2. Step 2: Convert to fraction form
    910/1,255.86 = 560.52/x
  3. Step 3: Cross multiply
    910x = 1,255.86 × 560.52
  4. Step 4: Simplify right side
    910x = 703,934.65
  5. Step 5: Solve for x
    x = 703,934.65/910
  6. Step 6: Final answer
    x = 773.55

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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.