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Finding the Fourth Proportional to 643.03, 964.53 and 352.38

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Solution

The fourth proportional to 643.03, 964.53 and 352.38 is: 528.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.03 : 964.53 = 352.38 : x
  2. Step 2: Convert to fraction form
    643.03/964.53 = 352.38/x
  3. Step 3: Cross multiply
    643.03x = 964.53 × 352.38
  4. Step 4: Simplify right side
    643.03x = 339,878.67
  5. Step 5: Solve for x
    x = 339,878.67/643.03
  6. Step 6: Final answer
    x = 528.56

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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.