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Finding the Fourth Proportional to 845.50, 1,269.15 and 548.12

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Solution

The fourth proportional to 845.50, 1,269.15 and 548.12 is: 822.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.50 : 1,269.15 = 548.12 : x
  2. Step 2: Convert to fraction form
    845.50/1,269.15 = 548.12/x
  3. Step 3: Cross multiply
    845.50x = 1,269.15 × 548.12
  4. Step 4: Simplify right side
    845.50x = 695,646.50
  5. Step 5: Solve for x
    x = 695,646.50/845.50
  6. Step 6: Final answer
    x = 822.77

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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.