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Finding the Fourth Proportional to 908.20, 1,362.10 and 331.08

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Solution

The fourth proportional to 908.20, 1,362.10 and 331.08 is: 496.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.20 : 1,362.10 = 331.08 : x
  2. Step 2: Convert to fraction form
    908.20/1,362.10 = 331.08/x
  3. Step 3: Cross multiply
    908.20x = 1,362.10 × 331.08
  4. Step 4: Simplify right side
    908.20x = 450,964.07
  5. Step 5: Solve for x
    x = 450,964.07/908.20
  6. Step 6: Final answer
    x = 496.55

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Double scale
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1.5x scale

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.