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Finding the Fourth Proportional to 417.96, 576.68 and 243.18

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Solution

The fourth proportional to 417.96, 576.68 and 243.18 is: 335.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.96 : 576.68 = 243.18 : x
  2. Step 2: Convert to fraction form
    417.96/576.68 = 243.18/x
  3. Step 3: Cross multiply
    417.96x = 576.68 × 243.18
  4. Step 4: Simplify right side
    417.96x = 140,235.83
  5. Step 5: Solve for x
    x = 140,235.83/417.96
  6. Step 6: Final answer
    x = 335.52

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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.