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Finding the Fourth Proportional to 330.80, 456.72 and 265.60

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Solution

The fourth proportional to 330.80, 456.72 and 265.60 is: 366.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.80 : 456.72 = 265.60 : x
  2. Step 2: Convert to fraction form
    330.80/456.72 = 265.60/x
  3. Step 3: Cross multiply
    330.80x = 456.72 × 265.60
  4. Step 4: Simplify right side
    330.80x = 121,304.83
  5. Step 5: Solve for x
    x = 121,304.83/330.80
  6. Step 6: Final answer
    x = 366.70

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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.