Home / 1,109.91-1,531.64-612.55

Finding the Fourth Proportional to 1,109.91, 1,531.64 and 612.55

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Solution

The fourth proportional to 1,109.91, 1,531.64 and 612.55 is: 845.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.91 : 1,531.64 = 612.55 : x
  2. Step 2: Convert to fraction form
    1,109.91/1,531.64 = 612.55/x
  3. Step 3: Cross multiply
    1,109.91x = 1,531.64 × 612.55
  4. Step 4: Simplify right side
    1,109.91x = 938,211.44
  5. Step 5: Solve for x
    x = 938,211.44/1,109.91
  6. Step 6: Final answer
    x = 845.30

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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.