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Finding the Fourth Proportional to 2,172.78, 3,259.11 and 529.32

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Solution

The fourth proportional to 2,172.78, 3,259.11 and 529.32 is: 793.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.78 : 3,259.11 = 529.32 : x
  2. Step 2: Convert to fraction form
    2,172.78/3,259.11 = 529.32/x
  3. Step 3: Cross multiply
    2,172.78x = 3,259.11 × 529.32
  4. Step 4: Simplify right side
    2,172.78x = 1,725,112.11
  5. Step 5: Solve for x
    x = 1,725,112.11/2,172.78
  6. Step 6: Final answer
    x = 793.97

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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.