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Finding the Fourth Proportional to 380.38, 570.57 and 308.74

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Solution

The fourth proportional to 380.38, 570.57 and 308.74 is: 463.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.38 : 570.57 = 308.74 : x
  2. Step 2: Convert to fraction form
    380.38/570.57 = 308.74/x
  3. Step 3: Cross multiply
    380.38x = 570.57 × 308.74
  4. Step 4: Simplify right side
    380.38x = 176,157.78
  5. Step 5: Solve for x
    x = 176,157.78/380.38
  6. Step 6: Final answer
    x = 463.11

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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.