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Finding the Fourth Proportional to 224.18, 309.21 and 154.13

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Solution

The fourth proportional to 224.18, 309.21 and 154.13 is: 212.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.18 : 309.21 = 154.13 : x
  2. Step 2: Convert to fraction form
    224.18/309.21 = 154.13/x
  3. Step 3: Cross multiply
    224.18x = 309.21 × 154.13
  4. Step 4: Simplify right side
    224.18x = 47,658.77
  5. Step 5: Solve for x
    x = 47,658.77/224.18
  6. Step 6: Final answer
    x = 212.59

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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.