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Finding the Fourth Proportional to 339.63, 468.43 and 215.16

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Solution

The fourth proportional to 339.63, 468.43 and 215.16 is: 296.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.63 : 468.43 = 215.16 : x
  2. Step 2: Convert to fraction form
    339.63/468.43 = 215.16/x
  3. Step 3: Cross multiply
    339.63x = 468.43 × 215.16
  4. Step 4: Simplify right side
    339.63x = 100,787.40
  5. Step 5: Solve for x
    x = 100,787.40/339.63
  6. Step 6: Final answer
    x = 296.76

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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.