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Finding the Fourth Proportional to 437.30, 656.28 and 220.76

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Solution

The fourth proportional to 437.30, 656.28 and 220.76 is: 331.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.30 : 656.28 = 220.76 : x
  2. Step 2: Convert to fraction form
    437.30/656.28 = 220.76/x
  3. Step 3: Cross multiply
    437.30x = 656.28 × 220.76
  4. Step 4: Simplify right side
    437.30x = 144,880.37
  5. Step 5: Solve for x
    x = 144,880.37/437.30
  6. Step 6: Final answer
    x = 331.31

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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.