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Finding the Fourth Proportional to 3,983.58, 5,497.88 and 2,987.28

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Solution

The fourth proportional to 3,983.58, 5,497.88 and 2,987.28 is: 4,122.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,983.58 : 5,497.88 = 2,987.28 : x
  2. Step 2: Convert to fraction form
    3,983.58/5,497.88 = 2,987.28/x
  3. Step 3: Cross multiply
    3,983.58x = 5,497.88 × 2,987.28
  4. Step 4: Simplify right side
    3,983.58x = 16,423,692.03
  5. Step 5: Solve for x
    x = 16,423,692.03/3,983.58
  6. Step 6: Final answer
    x = 4,122.85

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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.