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Finding the Fourth Proportional to 1,539.89, 2,309.96 and 552.90

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Solution

The fourth proportional to 1,539.89, 2,309.96 and 552.90 is: 829.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.89 : 2,309.96 = 552.90 : x
  2. Step 2: Convert to fraction form
    1,539.89/2,309.96 = 552.90/x
  3. Step 3: Cross multiply
    1,539.89x = 2,309.96 × 552.90
  4. Step 4: Simplify right side
    1,539.89x = 1,277,176.88
  5. Step 5: Solve for x
    x = 1,277,176.88/1,539.89
  6. Step 6: Final answer
    x = 829.39

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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.