Home / 1,519.71-2,279.55-869.98

Finding the Fourth Proportional to 1,519.71, 2,279.55 and 869.98

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Solution

The fourth proportional to 1,519.71, 2,279.55 and 869.98 is: 1,304.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.71 : 2,279.55 = 869.98 : x
  2. Step 2: Convert to fraction form
    1,519.71/2,279.55 = 869.98/x
  3. Step 3: Cross multiply
    1,519.71x = 2,279.55 × 869.98
  4. Step 4: Simplify right side
    1,519.71x = 1,983,162.91
  5. Step 5: Solve for x
    x = 1,983,162.91/1,519.71
  6. Step 6: Final answer
    x = 1,304.96

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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.