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Finding the Fourth Proportional to 936.59, 1,404.78 and 287.25

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Solution

The fourth proportional to 936.59, 1,404.78 and 287.25 is: 430.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.59 : 1,404.78 = 287.25 : x
  2. Step 2: Convert to fraction form
    936.59/1,404.78 = 287.25/x
  3. Step 3: Cross multiply
    936.59x = 1,404.78 × 287.25
  4. Step 4: Simplify right side
    936.59x = 403,523.06
  5. Step 5: Solve for x
    x = 403,523.06/936.59
  6. Step 6: Final answer
    x = 430.85

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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.