Home / 1,639.13-2,456.70-713.60

Finding the Fourth Proportional to 1,639.13, 2,456.70 and 713.60

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Solution

The fourth proportional to 1,639.13, 2,456.70 and 713.60 is: 1,069.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.13 : 2,456.70 = 713.60 : x
  2. Step 2: Convert to fraction form
    1,639.13/2,456.70 = 713.60/x
  3. Step 3: Cross multiply
    1,639.13x = 2,456.70 × 713.60
  4. Step 4: Simplify right side
    1,639.13x = 1,753,101.12
  5. Step 5: Solve for x
    x = 1,753,101.12/1,639.13
  6. Step 6: Final answer
    x = 1,069.53

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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.