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Finding the Fourth Proportional to 928.76, 1,393.38 and 484.16

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Solution

The fourth proportional to 928.76, 1,393.38 and 484.16 is: 726.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.76 : 1,393.38 = 484.16 : x
  2. Step 2: Convert to fraction form
    928.76/1,393.38 = 484.16/x
  3. Step 3: Cross multiply
    928.76x = 1,393.38 × 484.16
  4. Step 4: Simplify right side
    928.76x = 674,618.86
  5. Step 5: Solve for x
    x = 674,618.86/928.76
  6. Step 6: Final answer
    x = 726.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.