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Finding the Fourth Proportional to 1,249.75, 1,874.62 and 325.31

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Solution

The fourth proportional to 1,249.75, 1,874.62 and 325.31 is: 487.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.75 : 1,874.62 = 325.31 : x
  2. Step 2: Convert to fraction form
    1,249.75/1,874.62 = 325.31/x
  3. Step 3: Cross multiply
    1,249.75x = 1,874.62 × 325.31
  4. Step 4: Simplify right side
    1,249.75x = 609,832.63
  5. Step 5: Solve for x
    x = 609,832.63/1,249.75
  6. Step 6: Final answer
    x = 487.96

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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.