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Finding the Fourth Proportional to 3,319.25, 4,978.33 and 1,127.99

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Solution

The fourth proportional to 3,319.25, 4,978.33 and 1,127.99 is: 1,691.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.25 : 4,978.33 = 1,127.99 : x
  2. Step 2: Convert to fraction form
    3,319.25/4,978.33 = 1,127.99/x
  3. Step 3: Cross multiply
    3,319.25x = 4,978.33 × 1,127.99
  4. Step 4: Simplify right side
    3,319.25x = 5,615,516.08
  5. Step 5: Solve for x
    x = 5,615,516.08/3,319.25
  6. Step 6: Final answer
    x = 1,691.81

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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.