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Finding the Fourth Proportional to 643.24, 964.38 and 529

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Solution

The fourth proportional to 643.24, 964.38 and 529 is: 793.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.24 : 964.38 = 529 : x
  2. Step 2: Convert to fraction form
    643.24/964.38 = 529/x
  3. Step 3: Cross multiply
    643.24x = 964.38 × 529
  4. Step 4: Simplify right side
    643.24x = 510,157.02
  5. Step 5: Solve for x
    x = 510,157.02/643.24
  6. Step 6: Final answer
    x = 793.11

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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.