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Finding the Fourth Proportional to 564.22, 778.60 and 315.54

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Solution

The fourth proportional to 564.22, 778.60 and 315.54 is: 435.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.22 : 778.60 = 315.54 : x
  2. Step 2: Convert to fraction form
    564.22/778.60 = 315.54/x
  3. Step 3: Cross multiply
    564.22x = 778.60 × 315.54
  4. Step 4: Simplify right side
    564.22x = 245,679.44
  5. Step 5: Solve for x
    x = 245,679.44/564.22
  6. Step 6: Final answer
    x = 435.43

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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.