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Finding the Fourth Proportional to 224.20, 336.28 and 78.03

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Solution

The fourth proportional to 224.20, 336.28 and 78.03 is: 117.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.20 : 336.28 = 78.03 : x
  2. Step 2: Convert to fraction form
    224.20/336.28 = 78.03/x
  3. Step 3: Cross multiply
    224.20x = 336.28 × 78.03
  4. Step 4: Simplify right side
    224.20x = 26,239.66
  5. Step 5: Solve for x
    x = 26,239.66/224.20
  6. Step 6: Final answer
    x = 117.04

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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.