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Finding the Fourth Proportional to 437.56, 656 and 215.11

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Solution

The fourth proportional to 437.56, 656 and 215.11 is: 322.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.56 : 656 = 215.11 : x
  2. Step 2: Convert to fraction form
    437.56/656 = 215.11/x
  3. Step 3: Cross multiply
    437.56x = 656 × 215.11
  4. Step 4: Simplify right side
    437.56x = 141,112.16
  5. Step 5: Solve for x
    x = 141,112.16/437.56
  6. Step 6: Final answer
    x = 322.50

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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.