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Finding the Fourth Proportional to 890.38, 1,328.77 and 793.18

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Solution

The fourth proportional to 890.38, 1,328.77 and 793.18 is: 1,183.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.38 : 1,328.77 = 793.18 : x
  2. Step 2: Convert to fraction form
    890.38/1,328.77 = 793.18/x
  3. Step 3: Cross multiply
    890.38x = 1,328.77 × 793.18
  4. Step 4: Simplify right side
    890.38x = 1,053,953.79
  5. Step 5: Solve for x
    x = 1,053,953.79/890.38
  6. Step 6: Final answer
    x = 1,183.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.