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Finding the Fourth Proportional to 1,208.48, 1,812.57 and 331.05

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Solution

The fourth proportional to 1,208.48, 1,812.57 and 331.05 is: 496.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.48 : 1,812.57 = 331.05 : x
  2. Step 2: Convert to fraction form
    1,208.48/1,812.57 = 331.05/x
  3. Step 3: Cross multiply
    1,208.48x = 1,812.57 × 331.05
  4. Step 4: Simplify right side
    1,208.48x = 600,051.30
  5. Step 5: Solve for x
    x = 600,051.30/1,208.48
  6. Step 6: Final answer
    x = 496.53

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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.