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Finding the Fourth Proportional to 297, 445.61 and 142.92

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Solution

The fourth proportional to 297, 445.61 and 142.92 is: 214.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    297 : 445.61 = 142.92 : x
  2. Step 2: Convert to fraction form
    297/445.61 = 142.92/x
  3. Step 3: Cross multiply
    297x = 445.61 × 142.92
  4. Step 4: Simplify right side
    297x = 63,686.94
  5. Step 5: Solve for x
    x = 63,686.94/297
  6. Step 6: Final answer
    x = 214.43

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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.