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Finding the Fourth Proportional to 2,711.80, 4,068.10 and 862.37

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Solution

The fourth proportional to 2,711.80, 4,068.10 and 862.37 is: 1,293.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,711.80 : 4,068.10 = 862.37 : x
  2. Step 2: Convert to fraction form
    2,711.80/4,068.10 = 862.37/x
  3. Step 3: Cross multiply
    2,711.80x = 4,068.10 × 862.37
  4. Step 4: Simplify right side
    2,711.80x = 3,508,187.06
  5. Step 5: Solve for x
    x = 3,508,187.06/2,711.80
  6. Step 6: Final answer
    x = 1,293.68

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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.