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Finding the Fourth Proportional to 1,225.98, 1,839.20 and 495.62

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Solution

The fourth proportional to 1,225.98, 1,839.20 and 495.62 is: 743.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.98 : 1,839.20 = 495.62 : x
  2. Step 2: Convert to fraction form
    1,225.98/1,839.20 = 495.62/x
  3. Step 3: Cross multiply
    1,225.98x = 1,839.20 × 495.62
  4. Step 4: Simplify right side
    1,225.98x = 911,544.30
  5. Step 5: Solve for x
    x = 911,544.30/1,225.98
  6. Step 6: Final answer
    x = 743.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.