Home / 1,079.38-1,619.34-309.88

Finding the Fourth Proportional to 1,079.38, 1,619.34 and 309.88

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Solution

The fourth proportional to 1,079.38, 1,619.34 and 309.88 is: 464.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.38 : 1,619.34 = 309.88 : x
  2. Step 2: Convert to fraction form
    1,079.38/1,619.34 = 309.88/x
  3. Step 3: Cross multiply
    1,079.38x = 1,619.34 × 309.88
  4. Step 4: Simplify right side
    1,079.38x = 501,801.08
  5. Step 5: Solve for x
    x = 501,801.08/1,079.38
  6. Step 6: Final answer
    x = 464.90

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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.