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Finding the Fourth Proportional to 1,229.10, 1,843.62 and 612.62

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Solution

The fourth proportional to 1,229.10, 1,843.62 and 612.62 is: 918.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.10 : 1,843.62 = 612.62 : x
  2. Step 2: Convert to fraction form
    1,229.10/1,843.62 = 612.62/x
  3. Step 3: Cross multiply
    1,229.10x = 1,843.62 × 612.62
  4. Step 4: Simplify right side
    1,229.10x = 1,129,438.48
  5. Step 5: Solve for x
    x = 1,129,438.48/1,229.10
  6. Step 6: Final answer
    x = 918.92

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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.