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Finding the Fourth Proportional to 291.97, 437.97 and 145.73

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Solution

The fourth proportional to 291.97, 437.97 and 145.73 is: 218.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.97 : 437.97 = 145.73 : x
  2. Step 2: Convert to fraction form
    291.97/437.97 = 145.73/x
  3. Step 3: Cross multiply
    291.97x = 437.97 × 145.73
  4. Step 4: Simplify right side
    291.97x = 63,827.01
  5. Step 5: Solve for x
    x = 63,827.01/291.97
  6. Step 6: Final answer
    x = 218.61

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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.