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Finding the Fourth Proportional to 845.20, 1,266.96 and 412.96

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Solution

The fourth proportional to 845.20, 1,266.96 and 412.96 is: 619.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.20 : 1,266.96 = 412.96 : x
  2. Step 2: Convert to fraction form
    845.20/1,266.96 = 412.96/x
  3. Step 3: Cross multiply
    845.20x = 1,266.96 × 412.96
  4. Step 4: Simplify right side
    845.20x = 523,203.80
  5. Step 5: Solve for x
    x = 523,203.80/845.20
  6. Step 6: Final answer
    x = 619.03

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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.