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Finding the Fourth Proportional to 224.10, 307.80 and 218.70

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Solution

The fourth proportional to 224.10, 307.80 and 218.70 is: 300.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.10 : 307.80 = 218.70 : x
  2. Step 2: Convert to fraction form
    224.10/307.80 = 218.70/x
  3. Step 3: Cross multiply
    224.10x = 307.80 × 218.70
  4. Step 4: Simplify right side
    224.10x = 67,315.86
  5. Step 5: Solve for x
    x = 67,315.86/224.10
  6. Step 6: Final answer
    x = 300.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.