Home / 1,109.97-1,531.77-612.61

Finding the Fourth Proportional to 1,109.97, 1,531.77 and 612.61

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Solution

The fourth proportional to 1,109.97, 1,531.77 and 612.61 is: 845.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.97 : 1,531.77 = 612.61 : x
  2. Step 2: Convert to fraction form
    1,109.97/1,531.77 = 612.61/x
  3. Step 3: Cross multiply
    1,109.97x = 1,531.77 × 612.61
  4. Step 4: Simplify right side
    1,109.97x = 938,374.94
  5. Step 5: Solve for x
    x = 938,374.94/1,109.97
  6. Step 6: Final answer
    x = 845.41

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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.