Home / 1,109.80-1,531.38-612.46

Finding the Fourth Proportional to 1,109.80, 1,531.38 and 612.46

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Solution

The fourth proportional to 1,109.80, 1,531.38 and 612.46 is: 845.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.80 : 1,531.38 = 612.46 : x
  2. Step 2: Convert to fraction form
    1,109.80/1,531.38 = 612.46/x
  3. Step 3: Cross multiply
    1,109.80x = 1,531.38 × 612.46
  4. Step 4: Simplify right side
    1,109.80x = 937,908.99
  5. Step 5: Solve for x
    x = 937,908.99/1,109.80
  6. Step 6: Final answer
    x = 845.12

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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.