Home / 1,458.20-2,185.42-726.20

Finding the Fourth Proportional to 1,458.20, 2,185.42 and 726.20

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Solution

The fourth proportional to 1,458.20, 2,185.42 and 726.20 is: 1,088.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.20 : 2,185.42 = 726.20 : x
  2. Step 2: Convert to fraction form
    1,458.20/2,185.42 = 726.20/x
  3. Step 3: Cross multiply
    1,458.20x = 2,185.42 × 726.20
  4. Step 4: Simplify right side
    1,458.20x = 1,587,052.00
  5. Step 5: Solve for x
    x = 1,587,052.00/1,458.20
  6. Step 6: Final answer
    x = 1,088.36

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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.