Home / 2,010.20-3,015.15-839.90

Finding the Fourth Proportional to 2,010.20, 3,015.15 and 839.90

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Solution

The fourth proportional to 2,010.20, 3,015.15 and 839.90 is: 1,259.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,010.20 : 3,015.15 = 839.90 : x
  2. Step 2: Convert to fraction form
    2,010.20/3,015.15 = 839.90/x
  3. Step 3: Cross multiply
    2,010.20x = 3,015.15 × 839.90
  4. Step 4: Simplify right side
    2,010.20x = 2,532,424.49
  5. Step 5: Solve for x
    x = 2,532,424.49/2,010.20
  6. Step 6: Final answer
    x = 1,259.79

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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.