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Finding the Fourth Proportional to 317.77, 438.22 and 229.83

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Solution

The fourth proportional to 317.77, 438.22 and 229.83 is: 316.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.77 : 438.22 = 229.83 : x
  2. Step 2: Convert to fraction form
    317.77/438.22 = 229.83/x
  3. Step 3: Cross multiply
    317.77x = 438.22 × 229.83
  4. Step 4: Simplify right side
    317.77x = 100,718.15
  5. Step 5: Solve for x
    x = 100,718.15/317.77
  6. Step 6: Final answer
    x = 316.95

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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.