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Finding the Fourth Proportional to 215.46, 297.14 and 149.99

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Solution

The fourth proportional to 215.46, 297.14 and 149.99 is: 206.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.46 : 297.14 = 149.99 : x
  2. Step 2: Convert to fraction form
    215.46/297.14 = 149.99/x
  3. Step 3: Cross multiply
    215.46x = 297.14 × 149.99
  4. Step 4: Simplify right side
    215.46x = 44,565.79
  5. Step 5: Solve for x
    x = 44,565.79/215.46
  6. Step 6: Final answer
    x = 206.84

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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.