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Finding the Fourth Proportional to 2,868.82, 3,958.11 and 1,689.46

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Solution

The fourth proportional to 2,868.82, 3,958.11 and 1,689.46 is: 2,330.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.82 : 3,958.11 = 1,689.46 : x
  2. Step 2: Convert to fraction form
    2,868.82/3,958.11 = 1,689.46/x
  3. Step 3: Cross multiply
    2,868.82x = 3,958.11 × 1,689.46
  4. Step 4: Simplify right side
    2,868.82x = 6,687,068.52
  5. Step 5: Solve for x
    x = 6,687,068.52/2,868.82
  6. Step 6: Final answer
    x = 2,330.95

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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.