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Finding the Fourth Proportional to 3,581.88, 4,942.50 and 1,988.64

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Solution

The fourth proportional to 3,581.88, 4,942.50 and 1,988.64 is: 2,744.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,581.88 : 4,942.50 = 1,988.64 : x
  2. Step 2: Convert to fraction form
    3,581.88/4,942.50 = 1,988.64/x
  3. Step 3: Cross multiply
    3,581.88x = 4,942.50 × 1,988.64
  4. Step 4: Simplify right side
    3,581.88x = 9,828,853.20
  5. Step 5: Solve for x
    x = 9,828,853.20/3,581.88
  6. Step 6: Final answer
    x = 2,744.05

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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.