Home / 2,072.31-3,108.45-839.70

Finding the Fourth Proportional to 2,072.31, 3,108.45 and 839.70

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Solution

The fourth proportional to 2,072.31, 3,108.45 and 839.70 is: 1,259.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.31 : 3,108.45 = 839.70 : x
  2. Step 2: Convert to fraction form
    2,072.31/3,108.45 = 839.70/x
  3. Step 3: Cross multiply
    2,072.31x = 3,108.45 × 839.70
  4. Step 4: Simplify right side
    2,072.31x = 2,610,165.47
  5. Step 5: Solve for x
    x = 2,610,165.47/2,072.31
  6. Step 6: Final answer
    x = 1,259.54

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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.