Home / 2,077.87-3,115.26-981.61

Finding the Fourth Proportional to 2,077.87, 3,115.26 and 981.61

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Solution

The fourth proportional to 2,077.87, 3,115.26 and 981.61 is: 1,471.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,077.87 : 3,115.26 = 981.61 : x
  2. Step 2: Convert to fraction form
    2,077.87/3,115.26 = 981.61/x
  3. Step 3: Cross multiply
    2,077.87x = 3,115.26 × 981.61
  4. Step 4: Simplify right side
    2,077.87x = 3,057,970.37
  5. Step 5: Solve for x
    x = 3,057,970.37/2,077.87
  6. Step 6: Final answer
    x = 1,471.69

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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.