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Finding the Fourth Proportional to 568.93, 853.71 and 280.39

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Solution

The fourth proportional to 568.93, 853.71 and 280.39 is: 420.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.93 : 853.71 = 280.39 : x
  2. Step 2: Convert to fraction form
    568.93/853.71 = 280.39/x
  3. Step 3: Cross multiply
    568.93x = 853.71 × 280.39
  4. Step 4: Simplify right side
    568.93x = 239,371.75
  5. Step 5: Solve for x
    x = 239,371.75/568.93
  6. Step 6: Final answer
    x = 420.74

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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.