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Finding the Fourth Proportional to 3,988.84, 5,497.12 and 2,867.84

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Solution

The fourth proportional to 3,988.84, 5,497.12 and 2,867.84 is: 3,952.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.84 : 5,497.12 = 2,867.84 : x
  2. Step 2: Convert to fraction form
    3,988.84/5,497.12 = 2,867.84/x
  3. Step 3: Cross multiply
    3,988.84x = 5,497.12 × 2,867.84
  4. Step 4: Simplify right side
    3,988.84x = 15,764,818.80
  5. Step 5: Solve for x
    x = 15,764,818.80/3,988.84
  6. Step 6: Final answer
    x = 3,952.23

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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.