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Finding the Fourth Proportional to 921.82, 1,272.24 and 529

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Solution

The fourth proportional to 921.82, 1,272.24 and 529 is: 730.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.82 : 1,272.24 = 529 : x
  2. Step 2: Convert to fraction form
    921.82/1,272.24 = 529/x
  3. Step 3: Cross multiply
    921.82x = 1,272.24 × 529
  4. Step 4: Simplify right side
    921.82x = 673,014.96
  5. Step 5: Solve for x
    x = 673,014.96/921.82
  6. Step 6: Final answer
    x = 730.09

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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.