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Finding the Fourth Proportional to 803.38, 1,212.71 and 794.74

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Solution

The fourth proportional to 803.38, 1,212.71 and 794.74 is: 1,199.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.38 : 1,212.71 = 794.74 : x
  2. Step 2: Convert to fraction form
    803.38/1,212.71 = 794.74/x
  3. Step 3: Cross multiply
    803.38x = 1,212.71 × 794.74
  4. Step 4: Simplify right side
    803.38x = 963,789.15
  5. Step 5: Solve for x
    x = 963,789.15/803.38
  6. Step 6: Final answer
    x = 1,199.67

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.