Home / 1,109.95-1,531.75-612.61

Finding the Fourth Proportional to 1,109.95, 1,531.75 and 612.61

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Solution

The fourth proportional to 1,109.95, 1,531.75 and 612.61 is: 845.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.95 : 1,531.75 = 612.61 : x
  2. Step 2: Convert to fraction form
    1,109.95/1,531.75 = 612.61/x
  3. Step 3: Cross multiply
    1,109.95x = 1,531.75 × 612.61
  4. Step 4: Simplify right side
    1,109.95x = 938,365.37
  5. Step 5: Solve for x
    x = 938,365.37/1,109.95
  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.