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Finding the Fourth Proportional to 439.16, 657.92 and 219.53

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Solution

The fourth proportional to 439.16, 657.92 and 219.53 is: 328.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.16 : 657.92 = 219.53 : x
  2. Step 2: Convert to fraction form
    439.16/657.92 = 219.53/x
  3. Step 3: Cross multiply
    439.16x = 657.92 × 219.53
  4. Step 4: Simplify right side
    439.16x = 144,428.79
  5. Step 5: Solve for x
    x = 144,428.79/439.16
  6. Step 6: Final answer
    x = 328.88

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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.