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Finding the Fourth Proportional to 515.77, 772.42 and 268.32

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Solution

The fourth proportional to 515.77, 772.42 and 268.32 is: 401.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.77 : 772.42 = 268.32 : x
  2. Step 2: Convert to fraction form
    515.77/772.42 = 268.32/x
  3. Step 3: Cross multiply
    515.77x = 772.42 × 268.32
  4. Step 4: Simplify right side
    515.77x = 207,255.73
  5. Step 5: Solve for x
    x = 207,255.73/515.77
  6. Step 6: Final answer
    x = 401.84

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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.