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Finding the Fourth Proportional to 3,517.23, 5,275.74 and 920.18

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Solution

The fourth proportional to 3,517.23, 5,275.74 and 920.18 is: 1,380.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,517.23 : 5,275.74 = 920.18 : x
  2. Step 2: Convert to fraction form
    3,517.23/5,275.74 = 920.18/x
  3. Step 3: Cross multiply
    3,517.23x = 5,275.74 × 920.18
  4. Step 4: Simplify right side
    3,517.23x = 4,854,604.05
  5. Step 5: Solve for x
    x = 4,854,604.05/3,517.23
  6. Step 6: Final answer
    x = 1,380.24

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Double scale
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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.