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Finding the Fourth Proportional to 1,474.88, 2,211.74 and 487.48

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Solution

The fourth proportional to 1,474.88, 2,211.74 and 487.48 is: 731.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.88 : 2,211.74 = 487.48 : x
  2. Step 2: Convert to fraction form
    1,474.88/2,211.74 = 487.48/x
  3. Step 3: Cross multiply
    1,474.88x = 2,211.74 × 487.48
  4. Step 4: Simplify right side
    1,474.88x = 1,078,179.02
  5. Step 5: Solve for x
    x = 1,078,179.02/1,474.88
  6. Step 6: Final answer
    x = 731.03

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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.