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Finding the Fourth Proportional to 297.15, 445.86 and 142.99

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Solution

The fourth proportional to 297.15, 445.86 and 142.99 is: 214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.15 : 445.86 = 142.99 : x
  2. Step 2: Convert to fraction form
    297.15/445.86 = 142.99/x
  3. Step 3: Cross multiply
    297.15x = 445.86 × 142.99
  4. Step 4: Simplify right side
    297.15x = 63,753.52
  5. Step 5: Solve for x
    x = 63,753.52/297.15
  6. Step 6: Final answer
    x = 214.55

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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.