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Finding the Fourth Proportional to 346.18, 517.83 and 215.86

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Solution

The fourth proportional to 346.18, 517.83 and 215.86 is: 322.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.18 : 517.83 = 215.86 : x
  2. Step 2: Convert to fraction form
    346.18/517.83 = 215.86/x
  3. Step 3: Cross multiply
    346.18x = 517.83 × 215.86
  4. Step 4: Simplify right side
    346.18x = 111,778.78
  5. Step 5: Solve for x
    x = 111,778.78/346.18
  6. Step 6: Final answer
    x = 322.89

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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.