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Finding the Fourth Proportional to 1,241.52, 1,861.00 and 419.52

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Solution

The fourth proportional to 1,241.52, 1,861.00 and 419.52 is: 628.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.52 : 1,861.00 = 419.52 : x
  2. Step 2: Convert to fraction form
    1,241.52/1,861.00 = 419.52/x
  3. Step 3: Cross multiply
    1,241.52x = 1,861.00 × 419.52
  4. Step 4: Simplify right side
    1,241.52x = 780,724.62
  5. Step 5: Solve for x
    x = 780,724.62/1,241.52
  6. Step 6: Final answer
    x = 628.85

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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.