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Finding the Fourth Proportional to 568.60, 853.38 and 385.72

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Solution

The fourth proportional to 568.60, 853.38 and 385.72 is: 578.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.60 : 853.38 = 385.72 : x
  2. Step 2: Convert to fraction form
    568.60/853.38 = 385.72/x
  3. Step 3: Cross multiply
    568.60x = 853.38 × 385.72
  4. Step 4: Simplify right side
    568.60x = 329,165.73
  5. Step 5: Solve for x
    x = 329,165.73/568.60
  6. Step 6: Final answer
    x = 578.91

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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.