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Finding the Fourth Proportional to 349.32, 482.19 and 225.21

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Solution

The fourth proportional to 349.32, 482.19 and 225.21 is: 310.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.32 : 482.19 = 225.21 : x
  2. Step 2: Convert to fraction form
    349.32/482.19 = 225.21/x
  3. Step 3: Cross multiply
    349.32x = 482.19 × 225.21
  4. Step 4: Simplify right side
    349.32x = 108,594.01
  5. Step 5: Solve for x
    x = 108,594.01/349.32
  6. Step 6: Final answer
    x = 310.87

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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.