Home / 3,121.25-4,685.48-1,585.49

Finding the Fourth Proportional to 3,121.25, 4,685.48 and 1,585.49

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Solution

The fourth proportional to 3,121.25, 4,685.48 and 1,585.49 is: 2,380.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.25 : 4,685.48 = 1,585.49 : x
  2. Step 2: Convert to fraction form
    3,121.25/4,685.48 = 1,585.49/x
  3. Step 3: Cross multiply
    3,121.25x = 4,685.48 × 1,585.49
  4. Step 4: Simplify right side
    3,121.25x = 7,428,781.69
  5. Step 5: Solve for x
    x = 7,428,781.69/3,121.25
  6. Step 6: Final answer
    x = 2,380.07

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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.