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Finding the Fourth Proportional to 515.13, 772.22 and 206.93

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Solution

The fourth proportional to 515.13, 772.22 and 206.93 is: 310.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.13 : 772.22 = 206.93 : x
  2. Step 2: Convert to fraction form
    515.13/772.22 = 206.93/x
  3. Step 3: Cross multiply
    515.13x = 772.22 × 206.93
  4. Step 4: Simplify right side
    515.13x = 159,795.48
  5. Step 5: Solve for x
    x = 159,795.48/515.13
  6. Step 6: Final answer
    x = 310.20

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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.