Home / 1,110.67-1,531.60-668.49

Finding the Fourth Proportional to 1,110.67, 1,531.60 and 668.49

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Solution

The fourth proportional to 1,110.67, 1,531.60 and 668.49 is: 921.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.67 : 1,531.60 = 668.49 : x
  2. Step 2: Convert to fraction form
    1,110.67/1,531.60 = 668.49/x
  3. Step 3: Cross multiply
    1,110.67x = 1,531.60 × 668.49
  4. Step 4: Simplify right side
    1,110.67x = 1,023,859.28
  5. Step 5: Solve for x
    x = 1,023,859.28/1,110.67
  6. Step 6: Final answer
    x = 921.84

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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.