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Finding the Fourth Proportional to 1,234.65, 1,850.61 and 618.87

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Solution

The fourth proportional to 1,234.65, 1,850.61 and 618.87 is: 927.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.65 : 1,850.61 = 618.87 : x
  2. Step 2: Convert to fraction form
    1,234.65/1,850.61 = 618.87/x
  3. Step 3: Cross multiply
    1,234.65x = 1,850.61 × 618.87
  4. Step 4: Simplify right side
    1,234.65x = 1,145,287.01
  5. Step 5: Solve for x
    x = 1,145,287.01/1,234.65
  6. Step 6: Final answer
    x = 927.62

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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.