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Finding the Fourth Proportional to 936.26, 1,404.50 and 388.37

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Solution

The fourth proportional to 936.26, 1,404.50 and 388.37 is: 582.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.26 : 1,404.50 = 388.37 : x
  2. Step 2: Convert to fraction form
    936.26/1,404.50 = 388.37/x
  3. Step 3: Cross multiply
    936.26x = 1,404.50 × 388.37
  4. Step 4: Simplify right side
    936.26x = 545,465.67
  5. Step 5: Solve for x
    x = 545,465.67/936.26
  6. Step 6: Final answer
    x = 582.60

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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.