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Finding the Fourth Proportional to 482.86, 666.38 and 286.39

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Solution

The fourth proportional to 482.86, 666.38 and 286.39 is: 395.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.86 : 666.38 = 286.39 : x
  2. Step 2: Convert to fraction form
    482.86/666.38 = 286.39/x
  3. Step 3: Cross multiply
    482.86x = 666.38 × 286.39
  4. Step 4: Simplify right side
    482.86x = 190,839.80
  5. Step 5: Solve for x
    x = 190,839.80/482.86
  6. Step 6: Final answer
    x = 395.23

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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.