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Finding the Fourth Proportional to 681.80, 940.92 and 371.32

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Solution

The fourth proportional to 681.80, 940.92 and 371.32 is: 512.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.80 : 940.92 = 371.32 : x
  2. Step 2: Convert to fraction form
    681.80/940.92 = 371.32/x
  3. Step 3: Cross multiply
    681.80x = 940.92 × 371.32
  4. Step 4: Simplify right side
    681.80x = 349,382.41
  5. Step 5: Solve for x
    x = 349,382.41/681.80
  6. Step 6: Final answer
    x = 512.44

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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.