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Finding the Fourth Proportional to 3,992.70, 5,497.34 and 3,393.92

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Solution

The fourth proportional to 3,992.70, 5,497.34 and 3,393.92 is: 4,672.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.70 : 5,497.34 = 3,393.92 : x
  2. Step 2: Convert to fraction form
    3,992.70/5,497.34 = 3,393.92/x
  3. Step 3: Cross multiply
    3,992.70x = 5,497.34 × 3,393.92
  4. Step 4: Simplify right side
    3,992.70x = 18,657,532.17
  5. Step 5: Solve for x
    x = 18,657,532.17/3,992.70
  6. Step 6: Final answer
    x = 4,672.91

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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.