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Finding the Fourth Proportional to 515.13, 772.34 and 268.18

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Solution

The fourth proportional to 515.13, 772.34 and 268.18 is: 402.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.13 : 772.34 = 268.18 : x
  2. Step 2: Convert to fraction form
    515.13/772.34 = 268.18/x
  3. Step 3: Cross multiply
    515.13x = 772.34 × 268.18
  4. Step 4: Simplify right side
    515.13x = 207,122.87
  5. Step 5: Solve for x
    x = 207,122.87/515.13
  6. Step 6: Final answer
    x = 402.08

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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.