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Finding the Fourth Proportional to 2,474.65, 3,712.87 and 1,287.93

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Solution

The fourth proportional to 2,474.65, 3,712.87 and 1,287.93 is: 1,932.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,474.65 : 3,712.87 = 1,287.93 : x
  2. Step 2: Convert to fraction form
    2,474.65/3,712.87 = 1,287.93/x
  3. Step 3: Cross multiply
    2,474.65x = 3,712.87 × 1,287.93
  4. Step 4: Simplify right side
    2,474.65x = 4,781,932.19
  5. Step 5: Solve for x
    x = 4,781,932.19/2,474.65
  6. Step 6: Final answer
    x = 1,932.37

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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.