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Finding the Fourth Proportional to 3,988.09, 5,981.88 and 1,488.79

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Solution

The fourth proportional to 3,988.09, 5,981.88 and 1,488.79 is: 2,233.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.09 : 5,981.88 = 1,488.79 : x
  2. Step 2: Convert to fraction form
    3,988.09/5,981.88 = 1,488.79/x
  3. Step 3: Cross multiply
    3,988.09x = 5,981.88 × 1,488.79
  4. Step 4: Simplify right side
    3,988.09x = 8,905,748.17
  5. Step 5: Solve for x
    x = 8,905,748.17/3,988.09
  6. Step 6: Final answer
    x = 2,233.09

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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.