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Finding the Fourth Proportional to 909.60, 1,255.22 and 531.56

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Solution

The fourth proportional to 909.60, 1,255.22 and 531.56 is: 733.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.60 : 1,255.22 = 531.56 : x
  2. Step 2: Convert to fraction form
    909.60/1,255.22 = 531.56/x
  3. Step 3: Cross multiply
    909.60x = 1,255.22 × 531.56
  4. Step 4: Simplify right side
    909.60x = 667,224.74
  5. Step 5: Solve for x
    x = 667,224.74/909.60
  6. Step 6: Final answer
    x = 733.54

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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.