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Finding the Fourth Proportional to 7,319.52, 10,979.80 and 2,388.80

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Solution

The fourth proportional to 7,319.52, 10,979.80 and 2,388.80 is: 3,583.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,319.52 : 10,979.80 = 2,388.80 : x
  2. Step 2: Convert to fraction form
    7,319.52/10,979.80 = 2,388.80/x
  3. Step 3: Cross multiply
    7,319.52x = 10,979.80 × 2,388.80
  4. Step 4: Simplify right side
    7,319.52x = 26,228,546.24
  5. Step 5: Solve for x
    x = 26,228,546.24/7,319.52
  6. Step 6: Final answer
    x = 3,583.37

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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.