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Finding the Fourth Proportional to 2,179.40, 3,267.86 and 718.42

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Solution

The fourth proportional to 2,179.40, 3,267.86 and 718.42 is: 1,077.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.40 : 3,267.86 = 718.42 : x
  2. Step 2: Convert to fraction form
    2,179.40/3,267.86 = 718.42/x
  3. Step 3: Cross multiply
    2,179.40x = 3,267.86 × 718.42
  4. Step 4: Simplify right side
    2,179.40x = 2,347,695.98
  5. Step 5: Solve for x
    x = 2,347,695.98/2,179.40
  6. Step 6: Final answer
    x = 1,077.22

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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.