Home / 1,972.20-2,721.96-1,186.68

Finding the Fourth Proportional to 1,972.20, 2,721.96 and 1,186.68

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Solution

The fourth proportional to 1,972.20, 2,721.96 and 1,186.68 is: 1,637.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.20 : 2,721.96 = 1,186.68 : x
  2. Step 2: Convert to fraction form
    1,972.20/2,721.96 = 1,186.68/x
  3. Step 3: Cross multiply
    1,972.20x = 2,721.96 × 1,186.68
  4. Step 4: Simplify right side
    1,972.20x = 3,230,095.49
  5. Step 5: Solve for x
    x = 3,230,095.49/1,972.20
  6. Step 6: Final answer
    x = 1,637.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.