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Finding the Fourth Proportional to 1,233.92, 1,851.17 and 412.20

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Solution

The fourth proportional to 1,233.92, 1,851.17 and 412.20 is: 618.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.92 : 1,851.17 = 412.20 : x
  2. Step 2: Convert to fraction form
    1,233.92/1,851.17 = 412.20/x
  3. Step 3: Cross multiply
    1,233.92x = 1,851.17 × 412.20
  4. Step 4: Simplify right side
    1,233.92x = 763,052.27
  5. Step 5: Solve for x
    x = 763,052.27/1,233.92
  6. Step 6: Final answer
    x = 618.40

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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.