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Finding the Fourth Proportional to 314.79, 472.19 and 122.46

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Solution

The fourth proportional to 314.79, 472.19 and 122.46 is: 183.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.79 : 472.19 = 122.46 : x
  2. Step 2: Convert to fraction form
    314.79/472.19 = 122.46/x
  3. Step 3: Cross multiply
    314.79x = 472.19 × 122.46
  4. Step 4: Simplify right side
    314.79x = 57,823.78
  5. Step 5: Solve for x
    x = 57,823.78/314.79
  6. Step 6: Final answer
    x = 183.69

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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.