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Finding the Fourth Proportional to 3,394.72, 5,091.94 and 929.79

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Solution

The fourth proportional to 3,394.72, 5,091.94 and 929.79 is: 1,394.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,394.72 : 5,091.94 = 929.79 : x
  2. Step 2: Convert to fraction form
    3,394.72/5,091.94 = 929.79/x
  3. Step 3: Cross multiply
    3,394.72x = 5,091.94 × 929.79
  4. Step 4: Simplify right side
    3,394.72x = 4,734,436.05
  5. Step 5: Solve for x
    x = 4,734,436.05/3,394.72
  6. Step 6: Final answer
    x = 1,394.65

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1.5x scale

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.