Home / 2,185.63-3,278.50-724.79

Finding the Fourth Proportional to 2,185.63, 3,278.50 and 724.79

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Solution

The fourth proportional to 2,185.63, 3,278.50 and 724.79 is: 1,087.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.63 : 3,278.50 = 724.79 : x
  2. Step 2: Convert to fraction form
    2,185.63/3,278.50 = 724.79/x
  3. Step 3: Cross multiply
    2,185.63x = 3,278.50 × 724.79
  4. Step 4: Simplify right side
    2,185.63x = 2,376,230.40
  5. Step 5: Solve for x
    x = 2,376,230.40/2,185.63
  6. Step 6: Final answer
    x = 1,087.21

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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.