Home / 1,979.55-2,732.87-1,317.38

Finding the Fourth Proportional to 1,979.55, 2,732.87 and 1,317.38

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Solution

The fourth proportional to 1,979.55, 2,732.87 and 1,317.38 is: 1,818.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.55 : 2,732.87 = 1,317.38 : x
  2. Step 2: Convert to fraction form
    1,979.55/2,732.87 = 1,317.38/x
  3. Step 3: Cross multiply
    1,979.55x = 2,732.87 × 1,317.38
  4. Step 4: Simplify right side
    1,979.55x = 3,600,217.91
  5. Step 5: Solve for x
    x = 3,600,217.91/1,979.55
  6. Step 6: Final answer
    x = 1,818.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.