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Finding the Fourth Proportional to 943.73, 1,299.65 and 681.33

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Solution

The fourth proportional to 943.73, 1,299.65 and 681.33 is: 938.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.73 : 1,299.65 = 681.33 : x
  2. Step 2: Convert to fraction form
    943.73/1,299.65 = 681.33/x
  3. Step 3: Cross multiply
    943.73x = 1,299.65 × 681.33
  4. Step 4: Simplify right side
    943.73x = 885,490.53
  5. Step 5: Solve for x
    x = 885,490.53/943.73
  6. Step 6: Final answer
    x = 938.29

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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.