Home / 3,187.85-4,781.05-1,213.07

Finding the Fourth Proportional to 3,187.85, 4,781.05 and 1,213.07

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Solution

The fourth proportional to 3,187.85, 4,781.05 and 1,213.07 is: 1,819.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.85 : 4,781.05 = 1,213.07 : x
  2. Step 2: Convert to fraction form
    3,187.85/4,781.05 = 1,213.07/x
  3. Step 3: Cross multiply
    3,187.85x = 4,781.05 × 1,213.07
  4. Step 4: Simplify right side
    3,187.85x = 5,799,721.39
  5. Step 5: Solve for x
    x = 5,799,721.39/3,187.85
  6. Step 6: Final answer
    x = 1,819.32

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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.