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Finding the Fourth Proportional to 519.51, 716.87 and 286.64

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Solution

The fourth proportional to 519.51, 716.87 and 286.64 is: 395.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.51 : 716.87 = 286.64 : x
  2. Step 2: Convert to fraction form
    519.51/716.87 = 286.64/x
  3. Step 3: Cross multiply
    519.51x = 716.87 × 286.64
  4. Step 4: Simplify right side
    519.51x = 205,478.60
  5. Step 5: Solve for x
    x = 205,478.60/519.51
  6. Step 6: Final answer
    x = 395.52

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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.