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Finding the Fourth Proportional to 515.65, 772.80 and 241.25

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Solution

The fourth proportional to 515.65, 772.80 and 241.25 is: 361.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.65 : 772.80 = 241.25 : x
  2. Step 2: Convert to fraction form
    515.65/772.80 = 241.25/x
  3. Step 3: Cross multiply
    515.65x = 772.80 × 241.25
  4. Step 4: Simplify right side
    515.65x = 186,439.92
  5. Step 5: Solve for x
    x = 186,439.92/515.65
  6. Step 6: Final answer
    x = 361.56

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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.