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Finding the Fourth Proportional to 1,325.56, 1,988.31 and 351.73

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Solution

The fourth proportional to 1,325.56, 1,988.31 and 351.73 is: 527.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.56 : 1,988.31 = 351.73 : x
  2. Step 2: Convert to fraction form
    1,325.56/1,988.31 = 351.73/x
  3. Step 3: Cross multiply
    1,325.56x = 1,988.31 × 351.73
  4. Step 4: Simplify right side
    1,325.56x = 699,348.28
  5. Step 5: Solve for x
    x = 699,348.28/1,325.56
  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.