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Finding the Fourth Proportional to 275,369.28, 380,135.52 and 211,684.80

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Solution

The fourth proportional to 275,369.28, 380,135.52 and 211,684.80 is: 292,221.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,369.28 : 380,135.52 = 211,684.80 : x
  2. Step 2: Convert to fraction form
    275,369.28/380,135.52 = 211,684.80/x
  3. Step 3: Cross multiply
    275,369.28x = 380,135.52 × 211,684.80
  4. Step 4: Simplify right side
    275,369.28x = 80,468,911,524.10
  5. Step 5: Solve for x
    x = 80,468,911,524.10/275,369.28
  6. Step 6: Final answer
    x = 292,221.82

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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.