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Finding the Fourth Proportional to 5,326.70, 7,981.20 and 3,240.32

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Solution

The fourth proportional to 5,326.70, 7,981.20 and 3,240.32 is: 4,855.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,326.70 : 7,981.20 = 3,240.32 : x
  2. Step 2: Convert to fraction form
    5,326.70/7,981.20 = 3,240.32/x
  3. Step 3: Cross multiply
    5,326.70x = 7,981.20 × 3,240.32
  4. Step 4: Simplify right side
    5,326.70x = 25,861,602.08
  5. Step 5: Solve for x
    x = 25,861,602.08/5,326.70
  6. Step 6: Final answer
    x = 4,855.09

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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.