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Finding the Fourth Proportional to 374.80, 517.19 and 225.40

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Solution

The fourth proportional to 374.80, 517.19 and 225.40 is: 311.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.80 : 517.19 = 225.40 : x
  2. Step 2: Convert to fraction form
    374.80/517.19 = 225.40/x
  3. Step 3: Cross multiply
    374.80x = 517.19 × 225.40
  4. Step 4: Simplify right side
    374.80x = 116,570.99
  5. Step 5: Solve for x
    x = 116,570.99/374.80
  6. Step 6: Final answer
    x = 311.02

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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.