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Finding the Fourth Proportional to 1,343.72, 2,014.59 and 418.75

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Solution

The fourth proportional to 1,343.72, 2,014.59 and 418.75 is: 627.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.72 : 2,014.59 = 418.75 : x
  2. Step 2: Convert to fraction form
    1,343.72/2,014.59 = 418.75/x
  3. Step 3: Cross multiply
    1,343.72x = 2,014.59 × 418.75
  4. Step 4: Simplify right side
    1,343.72x = 843,609.56
  5. Step 5: Solve for x
    x = 843,609.56/1,343.72
  6. Step 6: Final answer
    x = 627.82

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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.