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Finding the Fourth Proportional to 331.17, 492.59 and 330.06

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Solution

The fourth proportional to 331.17, 492.59 and 330.06 is: 490.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.17 : 492.59 = 330.06 : x
  2. Step 2: Convert to fraction form
    331.17/492.59 = 330.06/x
  3. Step 3: Cross multiply
    331.17x = 492.59 × 330.06
  4. Step 4: Simplify right side
    331.17x = 162,582.61
  5. Step 5: Solve for x
    x = 162,582.61/331.17
  6. Step 6: Final answer
    x = 490.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.