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Finding the Fourth Proportional to 515.16, 710.62 and 338.23

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Solution

The fourth proportional to 515.16, 710.62 and 338.23 is: 466.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.16 : 710.62 = 338.23 : x
  2. Step 2: Convert to fraction form
    515.16/710.62 = 338.23/x
  3. Step 3: Cross multiply
    515.16x = 710.62 × 338.23
  4. Step 4: Simplify right side
    515.16x = 240,350.95
  5. Step 5: Solve for x
    x = 240,350.95/515.16
  6. Step 6: Final answer
    x = 466.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.