Home / 1,729.20-2,385.36-1,065.60

Finding the Fourth Proportional to 1,729.20, 2,385.36 and 1,065.60

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Solution

The fourth proportional to 1,729.20, 2,385.36 and 1,065.60 is: 1,469.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.20 : 2,385.36 = 1,065.60 : x
  2. Step 2: Convert to fraction form
    1,729.20/2,385.36 = 1,065.60/x
  3. Step 3: Cross multiply
    1,729.20x = 2,385.36 × 1,065.60
  4. Step 4: Simplify right side
    1,729.20x = 2,541,839.62
  5. Step 5: Solve for x
    x = 2,541,839.62/1,729.20
  6. Step 6: Final answer
    x = 1,469.95

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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.