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Finding the Fourth Proportional to 330.40, 454.96 and 272.08

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Solution

The fourth proportional to 330.40, 454.96 and 272.08 is: 374.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.40 : 454.96 = 272.08 : x
  2. Step 2: Convert to fraction form
    330.40/454.96 = 272.08/x
  3. Step 3: Cross multiply
    330.40x = 454.96 × 272.08
  4. Step 4: Simplify right side
    330.40x = 123,785.52
  5. Step 5: Solve for x
    x = 123,785.52/330.40
  6. Step 6: Final answer
    x = 374.65

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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.