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Finding the Fourth Proportional to 414.91, 572.70 and 257.59

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Solution

The fourth proportional to 414.91, 572.70 and 257.59 is: 355.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.91 : 572.70 = 257.59 : x
  2. Step 2: Convert to fraction form
    414.91/572.70 = 257.59/x
  3. Step 3: Cross multiply
    414.91x = 572.70 × 257.59
  4. Step 4: Simplify right side
    414.91x = 147,521.79
  5. Step 5: Solve for x
    x = 147,521.79/414.91
  6. Step 6: Final answer
    x = 355.55

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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.