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Finding the Fourth Proportional to 730.89, 1,095.31 and 548.09

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Solution

The fourth proportional to 730.89, 1,095.31 and 548.09 is: 821.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.89 : 1,095.31 = 548.09 : x
  2. Step 2: Convert to fraction form
    730.89/1,095.31 = 548.09/x
  3. Step 3: Cross multiply
    730.89x = 1,095.31 × 548.09
  4. Step 4: Simplify right side
    730.89x = 600,322.98
  5. Step 5: Solve for x
    x = 600,322.98/730.89
  6. Step 6: Final answer
    x = 821.36

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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.