Home / 3,990.75-5,507.24-2,312.48

Finding the Fourth Proportional to 3,990.75, 5,507.24 and 2,312.48

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Solution

The fourth proportional to 3,990.75, 5,507.24 and 2,312.48 is: 3,191.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.75 : 5,507.24 = 2,312.48 : x
  2. Step 2: Convert to fraction form
    3,990.75/5,507.24 = 2,312.48/x
  3. Step 3: Cross multiply
    3,990.75x = 5,507.24 × 2,312.48
  4. Step 4: Simplify right side
    3,990.75x = 12,735,407.32
  5. Step 5: Solve for x
    x = 12,735,407.32/3,990.75
  6. Step 6: Final answer
    x = 3,191.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.