Home / 1,109.03-1,530.45-611.72

Finding the Fourth Proportional to 1,109.03, 1,530.45 and 611.72

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Solution

The fourth proportional to 1,109.03, 1,530.45 and 611.72 is: 844.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.03 : 1,530.45 = 611.72 : x
  2. Step 2: Convert to fraction form
    1,109.03/1,530.45 = 611.72/x
  3. Step 3: Cross multiply
    1,109.03x = 1,530.45 × 611.72
  4. Step 4: Simplify right side
    1,109.03x = 936,203.82
  5. Step 5: Solve for x
    x = 936,203.82/1,109.03
  6. Step 6: Final answer
    x = 844.16

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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.