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Finding the Fourth Proportional to 936.49, 1,403.13 and 662.05

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Solution

The fourth proportional to 936.49, 1,403.13 and 662.05 is: 991.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.49 : 1,403.13 = 662.05 : x
  2. Step 2: Convert to fraction form
    936.49/1,403.13 = 662.05/x
  3. Step 3: Cross multiply
    936.49x = 1,403.13 × 662.05
  4. Step 4: Simplify right side
    936.49x = 928,942.22
  5. Step 5: Solve for x
    x = 928,942.22/936.49
  6. Step 6: Final answer
    x = 991.94

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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.