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Finding the Fourth Proportional to 564.91, 779.57 and 328.90

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Solution

The fourth proportional to 564.91, 779.57 and 328.90 is: 453.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.91 : 779.57 = 328.90 : x
  2. Step 2: Convert to fraction form
    564.91/779.57 = 328.90/x
  3. Step 3: Cross multiply
    564.91x = 779.57 × 328.90
  4. Step 4: Simplify right side
    564.91x = 256,398.93
  5. Step 5: Solve for x
    x = 256,398.93/564.91
  6. Step 6: Final answer
    x = 453.88

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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.