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Finding the Fourth Proportional to 936.06, 1,404.27 and 319.80

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Solution

The fourth proportional to 936.06, 1,404.27 and 319.80 is: 479.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.06 : 1,404.27 = 319.80 : x
  2. Step 2: Convert to fraction form
    936.06/1,404.27 = 319.80/x
  3. Step 3: Cross multiply
    936.06x = 1,404.27 × 319.80
  4. Step 4: Simplify right side
    936.06x = 449,085.55
  5. Step 5: Solve for x
    x = 449,085.55/936.06
  6. Step 6: Final answer
    x = 479.76

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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.