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Finding the Fourth Proportional to 845.62, 1,269.75 and 804.46

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Solution

The fourth proportional to 845.62, 1,269.75 and 804.46 is: 1,207.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.62 : 1,269.75 = 804.46 : x
  2. Step 2: Convert to fraction form
    845.62/1,269.75 = 804.46/x
  3. Step 3: Cross multiply
    845.62x = 1,269.75 × 804.46
  4. Step 4: Simplify right side
    845.62x = 1,021,463.09
  5. Step 5: Solve for x
    x = 1,021,463.09/845.62
  6. Step 6: Final answer
    x = 1,207.95

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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.