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Finding the Fourth Proportional to 568.78, 853.21 and 157.95

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Solution

The fourth proportional to 568.78, 853.21 and 157.95 is: 236.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.78 : 853.21 = 157.95 : x
  2. Step 2: Convert to fraction form
    568.78/853.21 = 157.95/x
  3. Step 3: Cross multiply
    568.78x = 853.21 × 157.95
  4. Step 4: Simplify right side
    568.78x = 134,759.46
  5. Step 5: Solve for x
    x = 134,759.46/568.78
  6. Step 6: Final answer
    x = 236.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.