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Finding the Fourth Proportional to 266.09, 398.52 and 121.50

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Solution

The fourth proportional to 266.09, 398.52 and 121.50 is: 181.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.09 : 398.52 = 121.50 : x
  2. Step 2: Convert to fraction form
    266.09/398.52 = 121.50/x
  3. Step 3: Cross multiply
    266.09x = 398.52 × 121.50
  4. Step 4: Simplify right side
    266.09x = 48,420.18
  5. Step 5: Solve for x
    x = 48,420.18/266.09
  6. Step 6: Final answer
    x = 181.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.