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Finding the Fourth Proportional to 837.69, 1,254.90 and 548.25

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Solution

The fourth proportional to 837.69, 1,254.90 and 548.25 is: 821.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.69 : 1,254.90 = 548.25 : x
  2. Step 2: Convert to fraction form
    837.69/1,254.90 = 548.25/x
  3. Step 3: Cross multiply
    837.69x = 1,254.90 × 548.25
  4. Step 4: Simplify right side
    837.69x = 687,998.93
  5. Step 5: Solve for x
    x = 687,998.93/837.69
  6. Step 6: Final answer
    x = 821.30

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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.