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Finding the Fourth Proportional to 813.38, 1,219.94 and 236.12

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Solution

The fourth proportional to 813.38, 1,219.94 and 236.12 is: 354.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.38 : 1,219.94 = 236.12 : x
  2. Step 2: Convert to fraction form
    813.38/1,219.94 = 236.12/x
  3. Step 3: Cross multiply
    813.38x = 1,219.94 × 236.12
  4. Step 4: Simplify right side
    813.38x = 288,052.23
  5. Step 5: Solve for x
    x = 288,052.23/813.38
  6. Step 6: Final answer
    x = 354.14

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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.