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Finding the Fourth Proportional to 928.92, 1,391.58 and 495.48

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Solution

The fourth proportional to 928.92, 1,391.58 and 495.48 is: 742.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.92 : 1,391.58 = 495.48 : x
  2. Step 2: Convert to fraction form
    928.92/1,391.58 = 495.48/x
  3. Step 3: Cross multiply
    928.92x = 1,391.58 × 495.48
  4. Step 4: Simplify right side
    928.92x = 689,500.06
  5. Step 5: Solve for x
    x = 689,500.06/928.92
  6. Step 6: Final answer
    x = 742.26

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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.