Home / 1,115.26-1,539.12-673.18

Finding the Fourth Proportional to 1,115.26, 1,539.12 and 673.18

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Solution

The fourth proportional to 1,115.26, 1,539.12 and 673.18 is: 929.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.26 : 1,539.12 = 673.18 : x
  2. Step 2: Convert to fraction form
    1,115.26/1,539.12 = 673.18/x
  3. Step 3: Cross multiply
    1,115.26x = 1,539.12 × 673.18
  4. Step 4: Simplify right side
    1,115.26x = 1,036,104.80
  5. Step 5: Solve for x
    x = 1,036,104.80/1,115.26
  6. Step 6: Final answer
    x = 929.03

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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.