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Finding the Fourth Proportional to 215.54, 323.37 and 143.31

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Solution

The fourth proportional to 215.54, 323.37 and 143.31 is: 215.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.54 : 323.37 = 143.31 : x
  2. Step 2: Convert to fraction form
    215.54/323.37 = 143.31/x
  3. Step 3: Cross multiply
    215.54x = 323.37 × 143.31
  4. Step 4: Simplify right side
    215.54x = 46,342.15
  5. Step 5: Solve for x
    x = 46,342.15/215.54
  6. Step 6: Final answer
    x = 215.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.