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Finding the Fourth Proportional to 380.11, 570.48 and 197.56

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Solution

The fourth proportional to 380.11, 570.48 and 197.56 is: 296.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.11 : 570.48 = 197.56 : x
  2. Step 2: Convert to fraction form
    380.11/570.48 = 197.56/x
  3. Step 3: Cross multiply
    380.11x = 570.48 × 197.56
  4. Step 4: Simplify right side
    380.11x = 112,700.79
  5. Step 5: Solve for x
    x = 112,700.79/380.11
  6. Step 6: Final answer
    x = 296.50

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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.