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Finding the Fourth Proportional to 845.86, 1,269.18 and 298.45

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Solution

The fourth proportional to 845.86, 1,269.18 and 298.45 is: 447.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.86 : 1,269.18 = 298.45 : x
  2. Step 2: Convert to fraction form
    845.86/1,269.18 = 298.45/x
  3. Step 3: Cross multiply
    845.86x = 1,269.18 × 298.45
  4. Step 4: Simplify right side
    845.86x = 378,786.77
  5. Step 5: Solve for x
    x = 378,786.77/845.86
  6. Step 6: Final answer
    x = 447.81

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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.