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Finding the Fourth Proportional to 846.80, 1,269.20 and 837.68

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Solution

The fourth proportional to 846.80, 1,269.20 and 837.68 is: 1,255.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.80 : 1,269.20 = 837.68 : x
  2. Step 2: Convert to fraction form
    846.80/1,269.20 = 837.68/x
  3. Step 3: Cross multiply
    846.80x = 1,269.20 × 837.68
  4. Step 4: Simplify right side
    846.80x = 1,063,183.46
  5. Step 5: Solve for x
    x = 1,063,183.46/846.80
  6. Step 6: Final answer
    x = 1,255.53

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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.