Home / 1,327.66-1,990.19-742.95

Finding the Fourth Proportional to 1,327.66, 1,990.19 and 742.95

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Solution

The fourth proportional to 1,327.66, 1,990.19 and 742.95 is: 1,113.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.66 : 1,990.19 = 742.95 : x
  2. Step 2: Convert to fraction form
    1,327.66/1,990.19 = 742.95/x
  3. Step 3: Cross multiply
    1,327.66x = 1,990.19 × 742.95
  4. Step 4: Simplify right side
    1,327.66x = 1,478,611.66
  5. Step 5: Solve for x
    x = 1,478,611.66/1,327.66
  6. Step 6: Final answer
    x = 1,113.70

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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.