Home / 1,110.38-1,531.23-668.23

Finding the Fourth Proportional to 1,110.38, 1,531.23 and 668.23

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Solution

The fourth proportional to 1,110.38, 1,531.23 and 668.23 is: 921.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.38 : 1,531.23 = 668.23 : x
  2. Step 2: Convert to fraction form
    1,110.38/1,531.23 = 668.23/x
  3. Step 3: Cross multiply
    1,110.38x = 1,531.23 × 668.23
  4. Step 4: Simplify right side
    1,110.38x = 1,023,213.82
  5. Step 5: Solve for x
    x = 1,023,213.82/1,110.38
  6. Step 6: Final answer
    x = 921.50

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1.5x scale

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.