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Finding the Fourth Proportional to 3,988.04, 5,980.98 and 1,679

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Solution

The fourth proportional to 3,988.04, 5,980.98 and 1,679 is: 2,518.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.04 : 5,980.98 = 1,679 : x
  2. Step 2: Convert to fraction form
    3,988.04/5,980.98 = 1,679/x
  3. Step 3: Cross multiply
    3,988.04x = 5,980.98 × 1,679
  4. Step 4: Simplify right side
    3,988.04x = 10,042,065.42
  5. Step 5: Solve for x
    x = 10,042,065.42/3,988.04
  6. Step 6: Final answer
    x = 2,518.05

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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.