Home / 2,167.20-2,989.12-1,381.50

Finding the Fourth Proportional to 2,167.20, 2,989.12 and 1,381.50

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Solution

The fourth proportional to 2,167.20, 2,989.12 and 1,381.50 is: 1,905.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.20 : 2,989.12 = 1,381.50 : x
  2. Step 2: Convert to fraction form
    2,167.20/2,989.12 = 1,381.50/x
  3. Step 3: Cross multiply
    2,167.20x = 2,989.12 × 1,381.50
  4. Step 4: Simplify right side
    2,167.20x = 4,129,469.28
  5. Step 5: Solve for x
    x = 4,129,469.28/2,167.20
  6. Step 6: Final answer
    x = 1,905.44

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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.