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Finding the Fourth Proportional to 832.88, 1,249.86 and 319.88

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Solution

The fourth proportional to 832.88, 1,249.86 and 319.88 is: 480.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.88 : 1,249.86 = 319.88 : x
  2. Step 2: Convert to fraction form
    832.88/1,249.86 = 319.88/x
  3. Step 3: Cross multiply
    832.88x = 1,249.86 × 319.88
  4. Step 4: Simplify right side
    832.88x = 399,805.22
  5. Step 5: Solve for x
    x = 399,805.22/832.88
  6. Step 6: Final answer
    x = 480.03

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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.