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Finding the Fourth Proportional to 568.40, 853.04 and 279.68

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Solution

The fourth proportional to 568.40, 853.04 and 279.68 is: 419.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.40 : 853.04 = 279.68 : x
  2. Step 2: Convert to fraction form
    568.40/853.04 = 279.68/x
  3. Step 3: Cross multiply
    568.40x = 853.04 × 279.68
  4. Step 4: Simplify right side
    568.40x = 238,578.23
  5. Step 5: Solve for x
    x = 238,578.23/568.40
  6. Step 6: Final answer
    x = 419.74

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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.