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Finding the Fourth Proportional to 344.75, 517.25 and 215.58

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Solution

The fourth proportional to 344.75, 517.25 and 215.58 is: 323.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.75 : 517.25 = 215.58 : x
  2. Step 2: Convert to fraction form
    344.75/517.25 = 215.58/x
  3. Step 3: Cross multiply
    344.75x = 517.25 × 215.58
  4. Step 4: Simplify right side
    344.75x = 111,509.29
  5. Step 5: Solve for x
    x = 111,509.29/344.75
  6. Step 6: Final answer
    x = 323.45

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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.