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Finding the Fourth Proportional to 3,938.65, 5,908.20 and 1,016.88

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Solution

The fourth proportional to 3,938.65, 5,908.20 and 1,016.88 is: 1,525.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.65 : 5,908.20 = 1,016.88 : x
  2. Step 2: Convert to fraction form
    3,938.65/5,908.20 = 1,016.88/x
  3. Step 3: Cross multiply
    3,938.65x = 5,908.20 × 1,016.88
  4. Step 4: Simplify right side
    3,938.65x = 6,007,930.42
  5. Step 5: Solve for x
    x = 6,007,930.42/3,938.65
  6. Step 6: Final answer
    x = 1,525.38

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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.