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Finding the Fourth Proportional to 2,891.34, 3,988.92 and 1,771.38

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Solution

The fourth proportional to 2,891.34, 3,988.92 and 1,771.38 is: 2,443.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.34 : 3,988.92 = 1,771.38 : x
  2. Step 2: Convert to fraction form
    2,891.34/3,988.92 = 1,771.38/x
  3. Step 3: Cross multiply
    2,891.34x = 3,988.92 × 1,771.38
  4. Step 4: Simplify right side
    2,891.34x = 7,065,893.11
  5. Step 5: Solve for x
    x = 7,065,893.11/2,891.34
  6. Step 6: Final answer
    x = 2,443.81

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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.