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Finding the Fourth Proportional to 1,221.73, 1,833.11 and 528.05

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Solution

The fourth proportional to 1,221.73, 1,833.11 and 528.05 is: 792.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.73 : 1,833.11 = 528.05 : x
  2. Step 2: Convert to fraction form
    1,221.73/1,833.11 = 528.05/x
  3. Step 3: Cross multiply
    1,221.73x = 1,833.11 × 528.05
  4. Step 4: Simplify right side
    1,221.73x = 967,970.32
  5. Step 5: Solve for x
    x = 967,970.32/1,221.73
  6. Step 6: Final answer
    x = 792.29

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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.