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Finding the Fourth Proportional to 289.98, 400.19 and 191.93

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Solution

The fourth proportional to 289.98, 400.19 and 191.93 is: 264.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.98 : 400.19 = 191.93 : x
  2. Step 2: Convert to fraction form
    289.98/400.19 = 191.93/x
  3. Step 3: Cross multiply
    289.98x = 400.19 × 191.93
  4. Step 4: Simplify right side
    289.98x = 76,805.51
  5. Step 5: Solve for x
    x = 76,805.51/289.98
  6. Step 6: Final answer
    x = 264.86

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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.