Home / 2,178.15-3,267.60-717.72

Finding the Fourth Proportional to 2,178.15, 3,267.60 and 717.72

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Solution

The fourth proportional to 2,178.15, 3,267.60 and 717.72 is: 1,076.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.15 : 3,267.60 = 717.72 : x
  2. Step 2: Convert to fraction form
    2,178.15/3,267.60 = 717.72/x
  3. Step 3: Cross multiply
    2,178.15x = 3,267.60 × 717.72
  4. Step 4: Simplify right side
    2,178.15x = 2,345,221.87
  5. Step 5: Solve for x
    x = 2,345,221.87/2,178.15
  6. Step 6: Final answer
    x = 1,076.70

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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.