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Finding the Fourth Proportional to 228.48, 315.12 and 157.44

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Solution

The fourth proportional to 228.48, 315.12 and 157.44 is: 217.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.48 : 315.12 = 157.44 : x
  2. Step 2: Convert to fraction form
    228.48/315.12 = 157.44/x
  3. Step 3: Cross multiply
    228.48x = 315.12 × 157.44
  4. Step 4: Simplify right side
    228.48x = 49,612.49
  5. Step 5: Solve for x
    x = 49,612.49/228.48
  6. Step 6: Final answer
    x = 217.14

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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.