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Finding the Fourth Proportional to 1,229.76, 1,844.78 and 407.97

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Solution

The fourth proportional to 1,229.76, 1,844.78 and 407.97 is: 612.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.76 : 1,844.78 = 407.97 : x
  2. Step 2: Convert to fraction form
    1,229.76/1,844.78 = 407.97/x
  3. Step 3: Cross multiply
    1,229.76x = 1,844.78 × 407.97
  4. Step 4: Simplify right side
    1,229.76x = 752,612.86
  5. Step 5: Solve for x
    x = 752,612.86/1,229.76
  6. Step 6: Final answer
    x = 612.00

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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.