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Finding the Fourth Proportional to 5,394.46, 7,443.85 and 3,978.92

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Solution

The fourth proportional to 5,394.46, 7,443.85 and 3,978.92 is: 5,490.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,394.46 : 7,443.85 = 3,978.92 : x
  2. Step 2: Convert to fraction form
    5,394.46/7,443.85 = 3,978.92/x
  3. Step 3: Cross multiply
    5,394.46x = 7,443.85 × 3,978.92
  4. Step 4: Simplify right side
    5,394.46x = 29,618,455.09
  5. Step 5: Solve for x
    x = 29,618,455.09/5,394.46
  6. Step 6: Final answer
    x = 5,490.53

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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.