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Finding the Fourth Proportional to 152.89, 228.26 and 138.54

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Solution

The fourth proportional to 152.89, 228.26 and 138.54 is: 206.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.89 : 228.26 = 138.54 : x
  2. Step 2: Convert to fraction form
    152.89/228.26 = 138.54/x
  3. Step 3: Cross multiply
    152.89x = 228.26 × 138.54
  4. Step 4: Simplify right side
    152.89x = 31,621.65
  5. Step 5: Solve for x
    x = 31,621.65/152.89
  6. Step 6: Final answer
    x = 206.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.