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Finding the Fourth Proportional to 890.91, 1,229.96 and 792.38

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Solution

The fourth proportional to 890.91, 1,229.96 and 792.38 is: 1,093.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.91 : 1,229.96 = 792.38 : x
  2. Step 2: Convert to fraction form
    890.91/1,229.96 = 792.38/x
  3. Step 3: Cross multiply
    890.91x = 1,229.96 × 792.38
  4. Step 4: Simplify right side
    890.91x = 974,600.76
  5. Step 5: Solve for x
    x = 974,600.76/890.91
  6. Step 6: Final answer
    x = 1,093.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.