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Finding the Fourth Proportional to 909.64, 1,255.26 and 560.26

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Solution

The fourth proportional to 909.64, 1,255.26 and 560.26 is: 773.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.64 : 1,255.26 = 560.26 : x
  2. Step 2: Convert to fraction form
    909.64/1,255.26 = 560.26/x
  3. Step 3: Cross multiply
    909.64x = 1,255.26 × 560.26
  4. Step 4: Simplify right side
    909.64x = 703,271.97
  5. Step 5: Solve for x
    x = 703,271.97/909.64
  6. Step 6: Final answer
    x = 773.13

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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.