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Finding the Fourth Proportional to 569.45, 853.88 and 261.03

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Solution

The fourth proportional to 569.45, 853.88 and 261.03 is: 391.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.45 : 853.88 = 261.03 : x
  2. Step 2: Convert to fraction form
    569.45/853.88 = 261.03/x
  3. Step 3: Cross multiply
    569.45x = 853.88 × 261.03
  4. Step 4: Simplify right side
    569.45x = 222,890.19
  5. Step 5: Solve for x
    x = 222,890.19/569.45
  6. Step 6: Final answer
    x = 391.42

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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.