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Finding the Fourth Proportional to 2,761.79, 3,811.28 and 1,502.87

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Solution

The fourth proportional to 2,761.79, 3,811.28 and 1,502.87 is: 2,073.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.79 : 3,811.28 = 1,502.87 : x
  2. Step 2: Convert to fraction form
    2,761.79/3,811.28 = 1,502.87/x
  3. Step 3: Cross multiply
    2,761.79x = 3,811.28 × 1,502.87
  4. Step 4: Simplify right side
    2,761.79x = 5,727,831.80
  5. Step 5: Solve for x
    x = 5,727,831.80/2,761.79
  6. Step 6: Final answer
    x = 2,073.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.