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Finding the Fourth Proportional to 437.47, 656.29 and 218.21

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Solution

The fourth proportional to 437.47, 656.29 and 218.21 is: 327.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.47 : 656.29 = 218.21 : x
  2. Step 2: Convert to fraction form
    437.47/656.29 = 218.21/x
  3. Step 3: Cross multiply
    437.47x = 656.29 × 218.21
  4. Step 4: Simplify right side
    437.47x = 143,209.04
  5. Step 5: Solve for x
    x = 143,209.04/437.47
  6. Step 6: Final answer
    x = 327.36

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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.