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Finding the Fourth Proportional to 331.50, 497.26 and 100.40

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Solution

The fourth proportional to 331.50, 497.26 and 100.40 is: 150.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.50 : 497.26 = 100.40 : x
  2. Step 2: Convert to fraction form
    331.50/497.26 = 100.40/x
  3. Step 3: Cross multiply
    331.50x = 497.26 × 100.40
  4. Step 4: Simplify right side
    331.50x = 49,924.90
  5. Step 5: Solve for x
    x = 49,924.90/331.50
  6. Step 6: Final answer
    x = 150.60

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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.