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Finding the Fourth Proportional to 374.98, 517.45 and 225.61

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Solution

The fourth proportional to 374.98, 517.45 and 225.61 is: 311.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.98 : 517.45 = 225.61 : x
  2. Step 2: Convert to fraction form
    374.98/517.45 = 225.61/x
  3. Step 3: Cross multiply
    374.98x = 517.45 × 225.61
  4. Step 4: Simplify right side
    374.98x = 116,742.74
  5. Step 5: Solve for x
    x = 116,742.74/374.98
  6. Step 6: Final answer
    x = 311.33

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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.