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Finding the Fourth Proportional to 1,517.46, 2,275.92 and 858.66

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Solution

The fourth proportional to 1,517.46, 2,275.92 and 858.66 is: 1,287.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.46 : 2,275.92 = 858.66 : x
  2. Step 2: Convert to fraction form
    1,517.46/2,275.92 = 858.66/x
  3. Step 3: Cross multiply
    1,517.46x = 2,275.92 × 858.66
  4. Step 4: Simplify right side
    1,517.46x = 1,954,241.47
  5. Step 5: Solve for x
    x = 1,954,241.47/1,517.46
  6. Step 6: Final answer
    x = 1,287.84

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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.