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Finding the Fourth Proportional to 923.23, 1,272.79 and 627.98

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Solution

The fourth proportional to 923.23, 1,272.79 and 627.98 is: 865.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.23 : 1,272.79 = 627.98 : x
  2. Step 2: Convert to fraction form
    923.23/1,272.79 = 627.98/x
  3. Step 3: Cross multiply
    923.23x = 1,272.79 × 627.98
  4. Step 4: Simplify right side
    923.23x = 799,286.66
  5. Step 5: Solve for x
    x = 799,286.66/923.23
  6. Step 6: Final answer
    x = 865.75

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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.