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Finding the Fourth Proportional to 1,447.34, 2,171.03 and 351.72

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Solution

The fourth proportional to 1,447.34, 2,171.03 and 351.72 is: 527.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.34 : 2,171.03 = 351.72 : x
  2. Step 2: Convert to fraction form
    1,447.34/2,171.03 = 351.72/x
  3. Step 3: Cross multiply
    1,447.34x = 2,171.03 × 351.72
  4. Step 4: Simplify right side
    1,447.34x = 763,592.91
  5. Step 5: Solve for x
    x = 763,592.91/1,447.34
  6. Step 6: Final answer
    x = 527.59

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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.