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Finding the Fourth Proportional to 943.80, 1,302.06 and 681.24

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Solution

The fourth proportional to 943.80, 1,302.06 and 681.24 is: 939.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.80 : 1,302.06 = 681.24 : x
  2. Step 2: Convert to fraction form
    943.80/1,302.06 = 681.24/x
  3. Step 3: Cross multiply
    943.80x = 1,302.06 × 681.24
  4. Step 4: Simplify right side
    943.80x = 887,015.35
  5. Step 5: Solve for x
    x = 887,015.35/943.80
  6. Step 6: Final answer
    x = 939.83

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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.