Home / 2,660.23-3,990.55-712.18

Finding the Fourth Proportional to 2,660.23, 3,990.55 and 712.18

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Solution

The fourth proportional to 2,660.23, 3,990.55 and 712.18 is: 1,068.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.23 : 3,990.55 = 712.18 : x
  2. Step 2: Convert to fraction form
    2,660.23/3,990.55 = 712.18/x
  3. Step 3: Cross multiply
    2,660.23x = 3,990.55 × 712.18
  4. Step 4: Simplify right side
    2,660.23x = 2,841,989.90
  5. Step 5: Solve for x
    x = 2,841,989.90/2,660.23
  6. Step 6: Final answer
    x = 1,068.32

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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.