Home / 1,508.26-2,081.21-878.99

Finding the Fourth Proportional to 1,508.26, 2,081.21 and 878.99

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Solution

The fourth proportional to 1,508.26, 2,081.21 and 878.99 is: 1,212.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508.26 : 2,081.21 = 878.99 : x
  2. Step 2: Convert to fraction form
    1,508.26/2,081.21 = 878.99/x
  3. Step 3: Cross multiply
    1,508.26x = 2,081.21 × 878.99
  4. Step 4: Simplify right side
    1,508.26x = 1,829,358.38
  5. Step 5: Solve for x
    x = 1,829,358.38/1,508.26
  6. Step 6: Final answer
    x = 1,212.90

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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.