Home / 1,519.31-2,278.94-869.58

Finding the Fourth Proportional to 1,519.31, 2,278.94 and 869.58

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Solution

The fourth proportional to 1,519.31, 2,278.94 and 869.58 is: 1,304.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.31 : 2,278.94 = 869.58 : x
  2. Step 2: Convert to fraction form
    1,519.31/2,278.94 = 869.58/x
  3. Step 3: Cross multiply
    1,519.31x = 2,278.94 × 869.58
  4. Step 4: Simplify right side
    1,519.31x = 1,981,720.65
  5. Step 5: Solve for x
    x = 1,981,720.65/1,519.31
  6. Step 6: Final answer
    x = 1,304.36

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1.5x scale

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.