Home / 1,115.30-1,539.13-673.12

Finding the Fourth Proportional to 1,115.30, 1,539.13 and 673.12

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Solution

The fourth proportional to 1,115.30, 1,539.13 and 673.12 is: 928.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.30 : 1,539.13 = 673.12 : x
  2. Step 2: Convert to fraction form
    1,115.30/1,539.13 = 673.12/x
  3. Step 3: Cross multiply
    1,115.30x = 1,539.13 × 673.12
  4. Step 4: Simplify right side
    1,115.30x = 1,036,019.19
  5. Step 5: Solve for x
    x = 1,036,019.19/1,115.30
  6. Step 6: Final answer
    x = 928.92

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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.