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Finding the Fourth Proportional to 354.81, 489.67 and 207.44

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Solution

The fourth proportional to 354.81, 489.67 and 207.44 is: 286.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.81 : 489.67 = 207.44 : x
  2. Step 2: Convert to fraction form
    354.81/489.67 = 207.44/x
  3. Step 3: Cross multiply
    354.81x = 489.67 × 207.44
  4. Step 4: Simplify right side
    354.81x = 101,575.22
  5. Step 5: Solve for x
    x = 101,575.22/354.81
  6. Step 6: Final answer
    x = 286.28

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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.