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Finding the Fourth Proportional to 3,985.48, 5,976.42 and 1,212.49

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Solution

The fourth proportional to 3,985.48, 5,976.42 and 1,212.49 is: 1,818.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.48 : 5,976.42 = 1,212.49 : x
  2. Step 2: Convert to fraction form
    3,985.48/5,976.42 = 1,212.49/x
  3. Step 3: Cross multiply
    3,985.48x = 5,976.42 × 1,212.49
  4. Step 4: Simplify right side
    3,985.48x = 7,246,349.49
  5. Step 5: Solve for x
    x = 7,246,349.49/3,985.48
  6. Step 6: Final answer
    x = 1,818.19

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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.