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Finding the Fourth Proportional to 314.75, 472.40 and 122.38

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Solution

The fourth proportional to 314.75, 472.40 and 122.38 is: 183.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.75 : 472.40 = 122.38 : x
  2. Step 2: Convert to fraction form
    314.75/472.40 = 122.38/x
  3. Step 3: Cross multiply
    314.75x = 472.40 × 122.38
  4. Step 4: Simplify right side
    314.75x = 57,812.31
  5. Step 5: Solve for x
    x = 57,812.31/314.75
  6. Step 6: Final answer
    x = 183.68

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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.