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Finding the Fourth Proportional to 519.11, 716.13 and 309.17

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Solution

The fourth proportional to 519.11, 716.13 and 309.17 is: 426.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.11 : 716.13 = 309.17 : x
  2. Step 2: Convert to fraction form
    519.11/716.13 = 309.17/x
  3. Step 3: Cross multiply
    519.11x = 716.13 × 309.17
  4. Step 4: Simplify right side
    519.11x = 221,405.02
  5. Step 5: Solve for x
    x = 221,405.02/519.11
  6. Step 6: Final answer
    x = 426.51

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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.