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Finding the Fourth Proportional to 936.08, 1,290.85 and 604.68

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Solution

The fourth proportional to 936.08, 1,290.85 and 604.68 is: 833.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.08 : 1,290.85 = 604.68 : x
  2. Step 2: Convert to fraction form
    936.08/1,290.85 = 604.68/x
  3. Step 3: Cross multiply
    936.08x = 1,290.85 × 604.68
  4. Step 4: Simplify right side
    936.08x = 780,551.18
  5. Step 5: Solve for x
    x = 780,551.18/936.08
  6. Step 6: Final answer
    x = 833.85

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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.