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Finding the Fourth Proportional to 417.49, 576.11 and 251.72

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Solution

The fourth proportional to 417.49, 576.11 and 251.72 is: 347.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.49 : 576.11 = 251.72 : x
  2. Step 2: Convert to fraction form
    417.49/576.11 = 251.72/x
  3. Step 3: Cross multiply
    417.49x = 576.11 × 251.72
  4. Step 4: Simplify right side
    417.49x = 145,018.41
  5. Step 5: Solve for x
    x = 145,018.41/417.49
  6. Step 6: Final answer
    x = 347.36

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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.