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Finding the Fourth Proportional to 515.80, 710.94 and 376.12

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Solution

The fourth proportional to 515.80, 710.94 and 376.12 is: 518.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.80 : 710.94 = 376.12 : x
  2. Step 2: Convert to fraction form
    515.80/710.94 = 376.12/x
  3. Step 3: Cross multiply
    515.80x = 710.94 × 376.12
  4. Step 4: Simplify right side
    515.80x = 267,398.75
  5. Step 5: Solve for x
    x = 267,398.75/515.80
  6. Step 6: Final answer
    x = 518.42

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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.