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Finding the Fourth Proportional to 936.35, 1,291.91 and 604.25

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Solution

The fourth proportional to 936.35, 1,291.91 and 604.25 is: 833.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.35 : 1,291.91 = 604.25 : x
  2. Step 2: Convert to fraction form
    936.35/1,291.91 = 604.25/x
  3. Step 3: Cross multiply
    936.35x = 1,291.91 × 604.25
  4. Step 4: Simplify right side
    936.35x = 780,636.62
  5. Step 5: Solve for x
    x = 780,636.62/936.35
  6. Step 6: Final answer
    x = 833.70

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1.5x scale

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.