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Finding the Fourth Proportional to 331.65, 498.99 and 263.91

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Solution

The fourth proportional to 331.65, 498.99 and 263.91 is: 397.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.65 : 498.99 = 263.91 : x
  2. Step 2: Convert to fraction form
    331.65/498.99 = 263.91/x
  3. Step 3: Cross multiply
    331.65x = 498.99 × 263.91
  4. Step 4: Simplify right side
    331.65x = 131,688.45
  5. Step 5: Solve for x
    x = 131,688.45/331.65
  6. Step 6: Final answer
    x = 397.07

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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.