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Finding the Fourth Proportional to 331.83, 456.98 and 330.75

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Solution

The fourth proportional to 331.83, 456.98 and 330.75 is: 455.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.83 : 456.98 = 330.75 : x
  2. Step 2: Convert to fraction form
    331.83/456.98 = 330.75/x
  3. Step 3: Cross multiply
    331.83x = 456.98 × 330.75
  4. Step 4: Simplify right side
    331.83x = 151,144.48
  5. Step 5: Solve for x
    x = 151,144.48/331.83
  6. Step 6: Final answer
    x = 455.49

Related Problems

Find fourth proportional to 165.92, 228.49 and 165.38
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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.