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Finding the Fourth Proportional to 349.61, 482.49 and 225.53

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Solution

The fourth proportional to 349.61, 482.49 and 225.53 is: 311.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.61 : 482.49 = 225.53 : x
  2. Step 2: Convert to fraction form
    349.61/482.49 = 225.53/x
  3. Step 3: Cross multiply
    349.61x = 482.49 × 225.53
  4. Step 4: Simplify right side
    349.61x = 108,816.21
  5. Step 5: Solve for x
    x = 108,816.21/349.61
  6. Step 6: Final answer
    x = 311.25

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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.