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Finding the Fourth Proportional to 564.48, 779.04 and 331.68

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Solution

The fourth proportional to 564.48, 779.04 and 331.68 is: 457.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.48 : 779.04 = 331.68 : x
  2. Step 2: Convert to fraction form
    564.48/779.04 = 331.68/x
  3. Step 3: Cross multiply
    564.48x = 779.04 × 331.68
  4. Step 4: Simplify right side
    564.48x = 258,391.99
  5. Step 5: Solve for x
    x = 258,391.99/564.48
  6. Step 6: Final answer
    x = 457.75

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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.