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Finding the Fourth Proportional to 681.25, 940.13 and 370.75

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Solution

The fourth proportional to 681.25, 940.13 and 370.75 is: 511.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.25 : 940.13 = 370.75 : x
  2. Step 2: Convert to fraction form
    681.25/940.13 = 370.75/x
  3. Step 3: Cross multiply
    681.25x = 940.13 × 370.75
  4. Step 4: Simplify right side
    681.25x = 348,551.34
  5. Step 5: Solve for x
    x = 348,551.34/681.25
  6. Step 6: Final answer
    x = 511.64

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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.