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Finding the Fourth Proportional to 577.60, 865.89 and 252.72

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Solution

The fourth proportional to 577.60, 865.89 and 252.72 is: 378.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.60 : 865.89 = 252.72 : x
  2. Step 2: Convert to fraction form
    577.60/865.89 = 252.72/x
  3. Step 3: Cross multiply
    577.60x = 865.89 × 252.72
  4. Step 4: Simplify right side
    577.60x = 218,827.72
  5. Step 5: Solve for x
    x = 218,827.72/577.60
  6. Step 6: Final answer
    x = 378.86

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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.