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Finding the Fourth Proportional to 339.16, 467.95 and 221.16

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Solution

The fourth proportional to 339.16, 467.95 and 221.16 is: 305.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.16 : 467.95 = 221.16 : x
  2. Step 2: Convert to fraction form
    339.16/467.95 = 221.16/x
  3. Step 3: Cross multiply
    339.16x = 467.95 × 221.16
  4. Step 4: Simplify right side
    339.16x = 103,491.82
  5. Step 5: Solve for x
    x = 103,491.82/339.16
  6. Step 6: Final answer
    x = 305.14

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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.