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Finding the Fourth Proportional to 1,327.26, 1,990.96 and 353.36

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Solution

The fourth proportional to 1,327.26, 1,990.96 and 353.36 is: 530.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.26 : 1,990.96 = 353.36 : x
  2. Step 2: Convert to fraction form
    1,327.26/1,990.96 = 353.36/x
  3. Step 3: Cross multiply
    1,327.26x = 1,990.96 × 353.36
  4. Step 4: Simplify right side
    1,327.26x = 703,525.63
  5. Step 5: Solve for x
    x = 703,525.63/1,327.26
  6. Step 6: Final answer
    x = 530.06

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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.