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Finding the Fourth Proportional to 297.40, 446.24 and 143.32

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Solution

The fourth proportional to 297.40, 446.24 and 143.32 is: 215.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.40 : 446.24 = 143.32 : x
  2. Step 2: Convert to fraction form
    297.40/446.24 = 143.32/x
  3. Step 3: Cross multiply
    297.40x = 446.24 × 143.32
  4. Step 4: Simplify right side
    297.40x = 63,955.12
  5. Step 5: Solve for x
    x = 63,955.12/297.40
  6. Step 6: Final answer
    x = 215.05

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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.