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Finding the Fourth Proportional to 297.31, 446.13 and 143.41

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Solution

The fourth proportional to 297.31, 446.13 and 143.41 is: 215.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.31 : 446.13 = 143.41 : x
  2. Step 2: Convert to fraction form
    297.31/446.13 = 143.41/x
  3. Step 3: Cross multiply
    297.31x = 446.13 × 143.41
  4. Step 4: Simplify right side
    297.31x = 63,979.50
  5. Step 5: Solve for x
    x = 63,979.50/297.31
  6. Step 6: Final answer
    x = 215.19

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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.