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Finding the Fourth Proportional to 921.54, 1,382.73 and 531.54

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Solution

The fourth proportional to 921.54, 1,382.73 and 531.54 is: 797.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.54 : 1,382.73 = 531.54 : x
  2. Step 2: Convert to fraction form
    921.54/1,382.73 = 531.54/x
  3. Step 3: Cross multiply
    921.54x = 1,382.73 × 531.54
  4. Step 4: Simplify right side
    921.54x = 734,976.30
  5. Step 5: Solve for x
    x = 734,976.30/921.54
  6. Step 6: Final answer
    x = 797.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.