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Finding the Fourth Proportional to 330.10, 453.43 and 320.38

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Solution

The fourth proportional to 330.10, 453.43 and 320.38 is: 440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.10 : 453.43 = 320.38 : x
  2. Step 2: Convert to fraction form
    330.10/453.43 = 320.38/x
  3. Step 3: Cross multiply
    330.10x = 453.43 × 320.38
  4. Step 4: Simplify right side
    330.10x = 145,269.90
  5. Step 5: Solve for x
    x = 145,269.90/330.10
  6. Step 6: Final answer
    x = 440.08

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.