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Finding the Fourth Proportional to 414.32, 572.22 and 309.83

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Solution

The fourth proportional to 414.32, 572.22 and 309.83 is: 427.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.32 : 572.22 = 309.83 : x
  2. Step 2: Convert to fraction form
    414.32/572.22 = 309.83/x
  3. Step 3: Cross multiply
    414.32x = 572.22 × 309.83
  4. Step 4: Simplify right side
    414.32x = 177,288.06
  5. Step 5: Solve for x
    x = 177,288.06/414.32
  6. Step 6: Final answer
    x = 427.91

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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.