Home / 1,109.27-1,530.80-611.90

Finding the Fourth Proportional to 1,109.27, 1,530.80 and 611.90

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Solution

The fourth proportional to 1,109.27, 1,530.80 and 611.90 is: 844.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.27 : 1,530.80 = 611.90 : x
  2. Step 2: Convert to fraction form
    1,109.27/1,530.80 = 611.90/x
  3. Step 3: Cross multiply
    1,109.27x = 1,530.80 × 611.90
  4. Step 4: Simplify right side
    1,109.27x = 936,693.46
  5. Step 5: Solve for x
    x = 936,693.46/1,109.27
  6. Step 6: Final answer
    x = 844.42

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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.