Home / 1,109.93-1,531.61-612.56

Finding the Fourth Proportional to 1,109.93, 1,531.61 and 612.56

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Solution

The fourth proportional to 1,109.93, 1,531.61 and 612.56 is: 845.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.93 : 1,531.61 = 612.56 : x
  2. Step 2: Convert to fraction form
    1,109.93/1,531.61 = 612.56/x
  3. Step 3: Cross multiply
    1,109.93x = 1,531.61 × 612.56
  4. Step 4: Simplify right side
    1,109.93x = 938,206.08
  5. Step 5: Solve for x
    x = 938,206.08/1,109.93
  6. Step 6: Final answer
    x = 845.29

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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.