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Finding the Fourth Proportional to 937.09, 1,405.77 and 287.88

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Solution

The fourth proportional to 937.09, 1,405.77 and 287.88 is: 431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.09 : 1,405.77 = 287.88 : x
  2. Step 2: Convert to fraction form
    937.09/1,405.77 = 287.88/x
  3. Step 3: Cross multiply
    937.09x = 1,405.77 × 287.88
  4. Step 4: Simplify right side
    937.09x = 404,693.07
  5. Step 5: Solve for x
    x = 404,693.07/937.09
  6. Step 6: Final answer
    x = 431.86

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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.