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Finding the Fourth Proportional to 380.03, 570.11 and 331.56

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Solution

The fourth proportional to 380.03, 570.11 and 331.56 is: 497.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.03 : 570.11 = 331.56 : x
  2. Step 2: Convert to fraction form
    380.03/570.11 = 331.56/x
  3. Step 3: Cross multiply
    380.03x = 570.11 × 331.56
  4. Step 4: Simplify right side
    380.03x = 189,024.01
  5. Step 5: Solve for x
    x = 189,024.01/380.03
  6. Step 6: Final answer
    x = 497.40

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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.