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Finding the Fourth Proportional to 519.28, 716.55 and 286.36

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Solution

The fourth proportional to 519.28, 716.55 and 286.36 is: 395.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.28 : 716.55 = 286.36 : x
  2. Step 2: Convert to fraction form
    519.28/716.55 = 286.36/x
  3. Step 3: Cross multiply
    519.28x = 716.55 × 286.36
  4. Step 4: Simplify right side
    519.28x = 205,191.26
  5. Step 5: Solve for x
    x = 205,191.26/519.28
  6. Step 6: Final answer
    x = 395.15

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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.