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Finding the Fourth Proportional to 961.21, 1,327.11 and 568.36

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Solution

The fourth proportional to 961.21, 1,327.11 and 568.36 is: 784.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.21 : 1,327.11 = 568.36 : x
  2. Step 2: Convert to fraction form
    961.21/1,327.11 = 568.36/x
  3. Step 3: Cross multiply
    961.21x = 1,327.11 × 568.36
  4. Step 4: Simplify right side
    961.21x = 754,270.79
  5. Step 5: Solve for x
    x = 754,270.79/961.21
  6. Step 6: Final answer
    x = 784.71

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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.