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Finding the Fourth Proportional to 312.38, 467.87 and 190.38

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Solution

The fourth proportional to 312.38, 467.87 and 190.38 is: 285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.38 : 467.87 = 190.38 : x
  2. Step 2: Convert to fraction form
    312.38/467.87 = 190.38/x
  3. Step 3: Cross multiply
    312.38x = 467.87 × 190.38
  4. Step 4: Simplify right side
    312.38x = 89,070.38
  5. Step 5: Solve for x
    x = 89,070.38/312.38
  6. Step 6: Final answer
    x = 285.13

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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.