Home / 1,519.81-2,278.90-787.57

Finding the Fourth Proportional to 1,519.81, 2,278.90 and 787.57

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Solution

The fourth proportional to 1,519.81, 2,278.90 and 787.57 is: 1,180.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.81 : 2,278.90 = 787.57 : x
  2. Step 2: Convert to fraction form
    1,519.81/2,278.90 = 787.57/x
  3. Step 3: Cross multiply
    1,519.81x = 2,278.90 × 787.57
  4. Step 4: Simplify right side
    1,519.81x = 1,794,793.27
  5. Step 5: Solve for x
    x = 1,794,793.27/1,519.81
  6. Step 6: Final answer
    x = 1,180.93

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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.