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Finding the Fourth Proportional to 320.52, 478.80 and 271.92

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Solution

The fourth proportional to 320.52, 478.80 and 271.92 is: 406.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.52 : 478.80 = 271.92 : x
  2. Step 2: Convert to fraction form
    320.52/478.80 = 271.92/x
  3. Step 3: Cross multiply
    320.52x = 478.80 × 271.92
  4. Step 4: Simplify right side
    320.52x = 130,195.30
  5. Step 5: Solve for x
    x = 130,195.30/320.52
  6. Step 6: Final answer
    x = 406.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.