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Finding the Fourth Proportional to 1,327.52, 1,991.14 and 353.72

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Solution

The fourth proportional to 1,327.52, 1,991.14 and 353.72 is: 530.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.52 : 1,991.14 = 353.72 : x
  2. Step 2: Convert to fraction form
    1,327.52/1,991.14 = 353.72/x
  3. Step 3: Cross multiply
    1,327.52x = 1,991.14 × 353.72
  4. Step 4: Simplify right side
    1,327.52x = 704,306.04
  5. Step 5: Solve for x
    x = 704,306.04/1,327.52
  6. Step 6: Final answer
    x = 530.54

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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.