Home / 1,109.61-1,531.40-612.36

Finding the Fourth Proportional to 1,109.61, 1,531.40 and 612.36

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Solution

The fourth proportional to 1,109.61, 1,531.40 and 612.36 is: 845.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.61 : 1,531.40 = 612.36 : x
  2. Step 2: Convert to fraction form
    1,109.61/1,531.40 = 612.36/x
  3. Step 3: Cross multiply
    1,109.61x = 1,531.40 × 612.36
  4. Step 4: Simplify right side
    1,109.61x = 937,765.04
  5. Step 5: Solve for x
    x = 937,765.04/1,109.61
  6. Step 6: Final answer
    x = 845.13

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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.