Home / 1,611.11-2,418.21-778.76

Finding the Fourth Proportional to 1,611.11, 2,418.21 and 778.76

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Solution

The fourth proportional to 1,611.11, 2,418.21 and 778.76 is: 1,168.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.11 : 2,418.21 = 778.76 : x
  2. Step 2: Convert to fraction form
    1,611.11/2,418.21 = 778.76/x
  3. Step 3: Cross multiply
    1,611.11x = 2,418.21 × 778.76
  4. Step 4: Simplify right side
    1,611.11x = 1,883,193.13
  5. Step 5: Solve for x
    x = 1,883,193.13/1,611.11
  6. Step 6: Final answer
    x = 1,168.88

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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.