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Finding the Fourth Proportional to 936.66, 1,395.54 and 923.29

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Solution

The fourth proportional to 936.66, 1,395.54 and 923.29 is: 1,375.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.66 : 1,395.54 = 923.29 : x
  2. Step 2: Convert to fraction form
    936.66/1,395.54 = 923.29/x
  3. Step 3: Cross multiply
    936.66x = 1,395.54 × 923.29
  4. Step 4: Simplify right side
    936.66x = 1,288,488.13
  5. Step 5: Solve for x
    x = 1,288,488.13/936.66
  6. Step 6: Final answer
    x = 1,375.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.