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Finding the Fourth Proportional to 643.36, 960.67 and 564.66

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Solution

The fourth proportional to 643.36, 960.67 and 564.66 is: 843.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.36 : 960.67 = 564.66 : x
  2. Step 2: Convert to fraction form
    643.36/960.67 = 564.66/x
  3. Step 3: Cross multiply
    643.36x = 960.67 × 564.66
  4. Step 4: Simplify right side
    643.36x = 542,451.92
  5. Step 5: Solve for x
    x = 542,451.92/643.36
  6. Step 6: Final answer
    x = 843.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.