Home / 1,319.91-1,979.87-395.25

Finding the Fourth Proportional to 1,319.91, 1,979.87 and 395.25

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Solution

The fourth proportional to 1,319.91, 1,979.87 and 395.25 is: 592.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.91 : 1,979.87 = 395.25 : x
  2. Step 2: Convert to fraction form
    1,319.91/1,979.87 = 395.25/x
  3. Step 3: Cross multiply
    1,319.91x = 1,979.87 × 395.25
  4. Step 4: Simplify right side
    1,319.91x = 782,543.62
  5. Step 5: Solve for x
    x = 782,543.62/1,319.91
  6. Step 6: Final answer
    x = 592.88

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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.