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Finding the Fourth Proportional to 331.83, 497.73 and 139.32

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Solution

The fourth proportional to 331.83, 497.73 and 139.32 is: 208.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.83 : 497.73 = 139.32 : x
  2. Step 2: Convert to fraction form
    331.83/497.73 = 139.32/x
  3. Step 3: Cross multiply
    331.83x = 497.73 × 139.32
  4. Step 4: Simplify right side
    331.83x = 69,343.74
  5. Step 5: Solve for x
    x = 69,343.74/331.83
  6. Step 6: Final answer
    x = 208.97

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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.