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Finding the Fourth Proportional to 2,178.43, 3,267.78 and 717.59

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Solution

The fourth proportional to 2,178.43, 3,267.78 and 717.59 is: 1,076.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.43 : 3,267.78 = 717.59 : x
  2. Step 2: Convert to fraction form
    2,178.43/3,267.78 = 717.59/x
  3. Step 3: Cross multiply
    2,178.43x = 3,267.78 × 717.59
  4. Step 4: Simplify right side
    2,178.43x = 2,344,931.73
  5. Step 5: Solve for x
    x = 2,344,931.73/2,178.43
  6. Step 6: Final answer
    x = 1,076.43

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1.5x scale

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.