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Finding the Fourth Proportional to 515.10, 772.61 and 222.59

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Solution

The fourth proportional to 515.10, 772.61 and 222.59 is: 333.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.10 : 772.61 = 222.59 : x
  2. Step 2: Convert to fraction form
    515.10/772.61 = 222.59/x
  3. Step 3: Cross multiply
    515.10x = 772.61 × 222.59
  4. Step 4: Simplify right side
    515.10x = 171,971.40
  5. Step 5: Solve for x
    x = 171,971.40/515.10
  6. Step 6: Final answer
    x = 333.86

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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.