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Finding the Fourth Proportional to 330.27, 456.40 and 297.46

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Solution

The fourth proportional to 330.27, 456.40 and 297.46 is: 411.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.27 : 456.40 = 297.46 : x
  2. Step 2: Convert to fraction form
    330.27/456.40 = 297.46/x
  3. Step 3: Cross multiply
    330.27x = 456.40 × 297.46
  4. Step 4: Simplify right side
    330.27x = 135,760.74
  5. Step 5: Solve for x
    x = 135,760.74/330.27
  6. Step 6: Final answer
    x = 411.06

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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.