Home / 1,989.20-2,743.26-1,242.92

Finding the Fourth Proportional to 1,989.20, 2,743.26 and 1,242.92

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Solution

The fourth proportional to 1,989.20, 2,743.26 and 1,242.92 is: 1,714.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.20 : 2,743.26 = 1,242.92 : x
  2. Step 2: Convert to fraction form
    1,989.20/2,743.26 = 1,242.92/x
  3. Step 3: Cross multiply
    1,989.20x = 2,743.26 × 1,242.92
  4. Step 4: Simplify right side
    1,989.20x = 3,409,652.72
  5. Step 5: Solve for x
    x = 3,409,652.72/1,989.20
  6. Step 6: Final answer
    x = 1,714.08

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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.