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Finding the Fourth Proportional to 2,892.61, 3,990.28 and 1,696.78

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Solution

The fourth proportional to 2,892.61, 3,990.28 and 1,696.78 is: 2,340.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,892.61 : 3,990.28 = 1,696.78 : x
  2. Step 2: Convert to fraction form
    2,892.61/3,990.28 = 1,696.78/x
  3. Step 3: Cross multiply
    2,892.61x = 3,990.28 × 1,696.78
  4. Step 4: Simplify right side
    2,892.61x = 6,770,627.30
  5. Step 5: Solve for x
    x = 6,770,627.30/2,892.61
  6. Step 6: Final answer
    x = 2,340.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.