Home / 1,438.80-2,158.19-1,181.76

Finding the Fourth Proportional to 1,438.80, 2,158.19 and 1,181.76

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Solution

The fourth proportional to 1,438.80, 2,158.19 and 1,181.76 is: 1,772.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.80 : 2,158.19 = 1,181.76 : x
  2. Step 2: Convert to fraction form
    1,438.80/2,158.19 = 1,181.76/x
  3. Step 3: Cross multiply
    1,438.80x = 2,158.19 × 1,181.76
  4. Step 4: Simplify right side
    1,438.80x = 2,550,462.61
  5. Step 5: Solve for x
    x = 2,550,462.61/1,438.80
  6. Step 6: Final answer
    x = 1,772.63

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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.