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Finding the Fourth Proportional to 936.06, 1,404.23 and 319.61

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Solution

The fourth proportional to 936.06, 1,404.23 and 319.61 is: 479.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.06 : 1,404.23 = 319.61 : x
  2. Step 2: Convert to fraction form
    936.06/1,404.23 = 319.61/x
  3. Step 3: Cross multiply
    936.06x = 1,404.23 × 319.61
  4. Step 4: Simplify right side
    936.06x = 448,797.33
  5. Step 5: Solve for x
    x = 448,797.33/936.06
  6. Step 6: Final answer
    x = 479.45

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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.