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Finding the Fourth Proportional to 681.05, 939.84 and 370.55

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Solution

The fourth proportional to 681.05, 939.84 and 370.55 is: 511.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.05 : 939.84 = 370.55 : x
  2. Step 2: Convert to fraction form
    681.05/939.84 = 370.55/x
  3. Step 3: Cross multiply
    681.05x = 939.84 × 370.55
  4. Step 4: Simplify right side
    681.05x = 348,253.01
  5. Step 5: Solve for x
    x = 348,253.01/681.05
  6. Step 6: Final answer
    x = 511.35

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.