Home / 1,729.11-2,385.40-1,065.72

Finding the Fourth Proportional to 1,729.11, 2,385.40 and 1,065.72

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Solution

The fourth proportional to 1,729.11, 2,385.40 and 1,065.72 is: 1,470.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.11 : 2,385.40 = 1,065.72 : x
  2. Step 2: Convert to fraction form
    1,729.11/2,385.40 = 1,065.72/x
  3. Step 3: Cross multiply
    1,729.11x = 2,385.40 × 1,065.72
  4. Step 4: Simplify right side
    1,729.11x = 2,542,168.49
  5. Step 5: Solve for x
    x = 2,542,168.49/1,729.11
  6. Step 6: Final answer
    x = 1,470.22

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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.