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Finding the Fourth Proportional to 943.72, 1,301.88 and 694.65

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Solution

The fourth proportional to 943.72, 1,301.88 and 694.65 is: 958.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.72 : 1,301.88 = 694.65 : x
  2. Step 2: Convert to fraction form
    943.72/1,301.88 = 694.65/x
  3. Step 3: Cross multiply
    943.72x = 1,301.88 × 694.65
  4. Step 4: Simplify right side
    943.72x = 904,350.94
  5. Step 5: Solve for x
    x = 904,350.94/943.72
  6. Step 6: Final answer
    x = 958.28

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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.