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Finding the Fourth Proportional to 483.18, 666.78 and 286.68

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Solution

The fourth proportional to 483.18, 666.78 and 286.68 is: 395.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.18 : 666.78 = 286.68 : x
  2. Step 2: Convert to fraction form
    483.18/666.78 = 286.68/x
  3. Step 3: Cross multiply
    483.18x = 666.78 × 286.68
  4. Step 4: Simplify right side
    483.18x = 191,152.49
  5. Step 5: Solve for x
    x = 191,152.49/483.18
  6. Step 6: Final answer
    x = 395.61

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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.