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Finding the Fourth Proportional to 3,988.76, 5,983.41 and 1,355.19

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Solution

The fourth proportional to 3,988.76, 5,983.41 and 1,355.19 is: 2,032.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.76 : 5,983.41 = 1,355.19 : x
  2. Step 2: Convert to fraction form
    3,988.76/5,983.41 = 1,355.19/x
  3. Step 3: Cross multiply
    3,988.76x = 5,983.41 × 1,355.19
  4. Step 4: Simplify right side
    3,988.76x = 8,108,657.40
  5. Step 5: Solve for x
    x = 8,108,657.40/3,988.76
  6. Step 6: Final answer
    x = 2,032.88

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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.