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Finding the Fourth Proportional to 1,720.52, 2,578.32 and 988.52

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Solution

The fourth proportional to 1,720.52, 2,578.32 and 988.52 is: 1,481.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.52 : 2,578.32 = 988.52 : x
  2. Step 2: Convert to fraction form
    1,720.52/2,578.32 = 988.52/x
  3. Step 3: Cross multiply
    1,720.52x = 2,578.32 × 988.52
  4. Step 4: Simplify right side
    1,720.52x = 2,548,720.89
  5. Step 5: Solve for x
    x = 2,548,720.89/1,720.52
  6. Step 6: Final answer
    x = 1,481.37

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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.