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Finding the Fourth Proportional to 3,935.31, 5,906.61 and 1,988.88

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Solution

The fourth proportional to 3,935.31, 5,906.61 and 1,988.88 is: 2,985.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.31 : 5,906.61 = 1,988.88 : x
  2. Step 2: Convert to fraction form
    3,935.31/5,906.61 = 1,988.88/x
  3. Step 3: Cross multiply
    3,935.31x = 5,906.61 × 1,988.88
  4. Step 4: Simplify right side
    3,935.31x = 11,747,538.50
  5. Step 5: Solve for x
    x = 11,747,538.50/3,935.31
  6. Step 6: Final answer
    x = 2,985.16

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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.