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Finding the Fourth Proportional to 3,988.98, 5,979.40 and 1,650.64

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Solution

The fourth proportional to 3,988.98, 5,979.40 and 1,650.64 is: 2,474.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.98 : 5,979.40 = 1,650.64 : x
  2. Step 2: Convert to fraction form
    3,988.98/5,979.40 = 1,650.64/x
  3. Step 3: Cross multiply
    3,988.98x = 5,979.40 × 1,650.64
  4. Step 4: Simplify right side
    3,988.98x = 9,869,836.82
  5. Step 5: Solve for x
    x = 9,869,836.82/3,988.98
  6. Step 6: Final answer
    x = 2,474.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.