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Finding the Fourth Proportional to 314.40, 433.40 and 197.76

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Solution

The fourth proportional to 314.40, 433.40 and 197.76 is: 272.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.40 : 433.40 = 197.76 : x
  2. Step 2: Convert to fraction form
    314.40/433.40 = 197.76/x
  3. Step 3: Cross multiply
    314.40x = 433.40 × 197.76
  4. Step 4: Simplify right side
    314.40x = 85,709.18
  5. Step 5: Solve for x
    x = 85,709.18/314.40
  6. Step 6: Final answer
    x = 272.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.