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Finding the Fourth Proportional to 577.12, 865.68 and 268.88

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Solution

The fourth proportional to 577.12, 865.68 and 268.88 is: 403.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.12 : 865.68 = 268.88 : x
  2. Step 2: Convert to fraction form
    577.12/865.68 = 268.88/x
  3. Step 3: Cross multiply
    577.12x = 865.68 × 268.88
  4. Step 4: Simplify right side
    577.12x = 232,764.04
  5. Step 5: Solve for x
    x = 232,764.04/577.12
  6. Step 6: Final answer
    x = 403.32

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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.