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Finding the Fourth Proportional to 417.88, 575.49 and 398.44

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Solution

The fourth proportional to 417.88, 575.49 and 398.44 is: 548.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.88 : 575.49 = 398.44 : x
  2. Step 2: Convert to fraction form
    417.88/575.49 = 398.44/x
  3. Step 3: Cross multiply
    417.88x = 575.49 × 398.44
  4. Step 4: Simplify right side
    417.88x = 229,298.24
  5. Step 5: Solve for x
    x = 229,298.24/417.88
  6. Step 6: Final answer
    x = 548.72

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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.