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Finding the Fourth Proportional to 228.41, 315.09 and 149.74

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Solution

The fourth proportional to 228.41, 315.09 and 149.74 is: 206.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.41 : 315.09 = 149.74 : x
  2. Step 2: Convert to fraction form
    228.41/315.09 = 149.74/x
  3. Step 3: Cross multiply
    228.41x = 315.09 × 149.74
  4. Step 4: Simplify right side
    228.41x = 47,181.58
  5. Step 5: Solve for x
    x = 47,181.58/228.41
  6. Step 6: Final answer
    x = 206.57

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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.