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Finding the Fourth Proportional to 1,720.88, 2,580.78 and 733.68

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Solution

The fourth proportional to 1,720.88, 2,580.78 and 733.68 is: 1,100.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.88 : 2,580.78 = 733.68 : x
  2. Step 2: Convert to fraction form
    1,720.88/2,580.78 = 733.68/x
  3. Step 3: Cross multiply
    1,720.88x = 2,580.78 × 733.68
  4. Step 4: Simplify right side
    1,720.88x = 1,893,466.67
  5. Step 5: Solve for x
    x = 1,893,466.67/1,720.88
  6. Step 6: Final answer
    x = 1,100.29

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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.