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Finding the Fourth Proportional to 483.31, 666.91 and 286.79

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Solution

The fourth proportional to 483.31, 666.91 and 286.79 is: 395.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.31 : 666.91 = 286.79 : x
  2. Step 2: Convert to fraction form
    483.31/666.91 = 286.79/x
  3. Step 3: Cross multiply
    483.31x = 666.91 × 286.79
  4. Step 4: Simplify right side
    483.31x = 191,259.07
  5. Step 5: Solve for x
    x = 191,259.07/483.31
  6. Step 6: Final answer
    x = 395.73

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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.