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Finding the Fourth Proportional to 847.49, 1,271.62 and 327.61

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Solution

The fourth proportional to 847.49, 1,271.62 and 327.61 is: 491.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.49 : 1,271.62 = 327.61 : x
  2. Step 2: Convert to fraction form
    847.49/1,271.62 = 327.61/x
  3. Step 3: Cross multiply
    847.49x = 1,271.62 × 327.61
  4. Step 4: Simplify right side
    847.49x = 416,589.07
  5. Step 5: Solve for x
    x = 416,589.07/847.49
  6. Step 6: Final answer
    x = 491.56

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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.