Home / 1,120.13-1,679.11-709.73

Finding the Fourth Proportional to 1,120.13, 1,679.11 and 709.73

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Solution

The fourth proportional to 1,120.13, 1,679.11 and 709.73 is: 1,063.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.13 : 1,679.11 = 709.73 : x
  2. Step 2: Convert to fraction form
    1,120.13/1,679.11 = 709.73/x
  3. Step 3: Cross multiply
    1,120.13x = 1,679.11 × 709.73
  4. Step 4: Simplify right side
    1,120.13x = 1,191,714.74
  5. Step 5: Solve for x
    x = 1,191,714.74/1,120.13
  6. Step 6: Final answer
    x = 1,063.91

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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.