Home / 2,185.18-3,278.31-724.36

Finding the Fourth Proportional to 2,185.18, 3,278.31 and 724.36

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Solution

The fourth proportional to 2,185.18, 3,278.31 and 724.36 is: 1,086.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.18 : 3,278.31 = 724.36 : x
  2. Step 2: Convert to fraction form
    2,185.18/3,278.31 = 724.36/x
  3. Step 3: Cross multiply
    2,185.18x = 3,278.31 × 724.36
  4. Step 4: Simplify right side
    2,185.18x = 2,374,676.63
  5. Step 5: Solve for x
    x = 2,374,676.63/2,185.18
  6. Step 6: Final answer
    x = 1,086.72

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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.