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Finding the Fourth Proportional to 380.10, 570.42 and 331.50

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Solution

The fourth proportional to 380.10, 570.42 and 331.50 is: 497.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.10 : 570.42 = 331.50 : x
  2. Step 2: Convert to fraction form
    380.10/570.42 = 331.50/x
  3. Step 3: Cross multiply
    380.10x = 570.42 × 331.50
  4. Step 4: Simplify right side
    380.10x = 189,094.23
  5. Step 5: Solve for x
    x = 189,094.23/380.10
  6. Step 6: Final answer
    x = 497.49

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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.