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Finding the Fourth Proportional to 417.76, 576.55 and 243.09

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Solution

The fourth proportional to 417.76, 576.55 and 243.09 is: 335.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.76 : 576.55 = 243.09 : x
  2. Step 2: Convert to fraction form
    417.76/576.55 = 243.09/x
  3. Step 3: Cross multiply
    417.76x = 576.55 × 243.09
  4. Step 4: Simplify right side
    417.76x = 140,155.09
  5. Step 5: Solve for x
    x = 140,155.09/417.76
  6. Step 6: Final answer
    x = 335.49

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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.