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Finding the Fourth Proportional to 414.88, 572.43 and 257.68

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Solution

The fourth proportional to 414.88, 572.43 and 257.68 is: 355.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.88 : 572.43 = 257.68 : x
  2. Step 2: Convert to fraction form
    414.88/572.43 = 257.68/x
  3. Step 3: Cross multiply
    414.88x = 572.43 × 257.68
  4. Step 4: Simplify right side
    414.88x = 147,503.76
  5. Step 5: Solve for x
    x = 147,503.76/414.88
  6. Step 6: Final answer
    x = 355.53

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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.