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Finding the Fourth Proportional to 307.10, 460.78 and 220.68

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Solution

The fourth proportional to 307.10, 460.78 and 220.68 is: 331.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.10 : 460.78 = 220.68 : x
  2. Step 2: Convert to fraction form
    307.10/460.78 = 220.68/x
  3. Step 3: Cross multiply
    307.10x = 460.78 × 220.68
  4. Step 4: Simplify right side
    307.10x = 101,684.93
  5. Step 5: Solve for x
    x = 101,684.93/307.10
  6. Step 6: Final answer
    x = 331.11

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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.