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Finding the Fourth Proportional to 515.78, 711.96 and 341.18

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Solution

The fourth proportional to 515.78, 711.96 and 341.18 is: 470.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.78 : 711.96 = 341.18 : x
  2. Step 2: Convert to fraction form
    515.78/711.96 = 341.18/x
  3. Step 3: Cross multiply
    515.78x = 711.96 × 341.18
  4. Step 4: Simplify right side
    515.78x = 242,906.51
  5. Step 5: Solve for x
    x = 242,906.51/515.78
  6. Step 6: Final answer
    x = 470.95

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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.