Home / 2,587.38-3,879.03-1,288.14

Finding the Fourth Proportional to 2,587.38, 3,879.03 and 1,288.14

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Solution

The fourth proportional to 2,587.38, 3,879.03 and 1,288.14 is: 1,931.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.38 : 3,879.03 = 1,288.14 : x
  2. Step 2: Convert to fraction form
    2,587.38/3,879.03 = 1,288.14/x
  3. Step 3: Cross multiply
    2,587.38x = 3,879.03 × 1,288.14
  4. Step 4: Simplify right side
    2,587.38x = 4,996,733.70
  5. Step 5: Solve for x
    x = 4,996,733.70/2,587.38
  6. Step 6: Final answer
    x = 1,931.19

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1.5x scale

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.