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Finding the Fourth Proportional to 3,387.88, 5,081.76 and 922.66

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Solution

The fourth proportional to 3,387.88, 5,081.76 and 922.66 is: 1,383.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.88 : 5,081.76 = 922.66 : x
  2. Step 2: Convert to fraction form
    3,387.88/5,081.76 = 922.66/x
  3. Step 3: Cross multiply
    3,387.88x = 5,081.76 × 922.66
  4. Step 4: Simplify right side
    3,387.88x = 4,688,736.68
  5. Step 5: Solve for x
    x = 4,688,736.68/3,387.88
  6. Step 6: Final answer
    x = 1,383.97

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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.