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Finding the Fourth Proportional to 681.06, 938.34 and 630.84

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Solution

The fourth proportional to 681.06, 938.34 and 630.84 is: 869.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.06 : 938.34 = 630.84 : x
  2. Step 2: Convert to fraction form
    681.06/938.34 = 630.84/x
  3. Step 3: Cross multiply
    681.06x = 938.34 × 630.84
  4. Step 4: Simplify right side
    681.06x = 591,942.41
  5. Step 5: Solve for x
    x = 591,942.41/681.06
  6. Step 6: Final answer
    x = 869.15

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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.