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Finding the Fourth Proportional to 3,892.55, 5,838.20 and 1,118.59

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Solution

The fourth proportional to 3,892.55, 5,838.20 and 1,118.59 is: 1,677.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,892.55 : 5,838.20 = 1,118.59 : x
  2. Step 2: Convert to fraction form
    3,892.55/5,838.20 = 1,118.59/x
  3. Step 3: Cross multiply
    3,892.55x = 5,838.20 × 1,118.59
  4. Step 4: Simplify right side
    3,892.55x = 6,530,531.95
  5. Step 5: Solve for x
    x = 6,530,531.95/3,892.55
  6. Step 6: Final answer
    x = 1,677.70

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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.