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Finding the Fourth Proportional to 1,325.49, 1,988.26 and 351.59

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Solution

The fourth proportional to 1,325.49, 1,988.26 and 351.59 is: 527.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.49 : 1,988.26 = 351.59 : x
  2. Step 2: Convert to fraction form
    1,325.49/1,988.26 = 351.59/x
  3. Step 3: Cross multiply
    1,325.49x = 1,988.26 × 351.59
  4. Step 4: Simplify right side
    1,325.49x = 699,052.33
  5. Step 5: Solve for x
    x = 699,052.33/1,325.49
  6. Step 6: Final answer
    x = 527.39

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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.