Home / 1,081.20-1,619.73-617.61

Finding the Fourth Proportional to 1,081.20, 1,619.73 and 617.61

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Solution

The fourth proportional to 1,081.20, 1,619.73 and 617.61 is: 925.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.20 : 1,619.73 = 617.61 : x
  2. Step 2: Convert to fraction form
    1,081.20/1,619.73 = 617.61/x
  3. Step 3: Cross multiply
    1,081.20x = 1,619.73 × 617.61
  4. Step 4: Simplify right side
    1,081.20x = 1,000,361.45
  5. Step 5: Solve for x
    x = 1,000,361.45/1,081.20
  6. Step 6: Final answer
    x = 925.23

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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.