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Finding the Fourth Proportional to 221,218.20, 331,827.30 and 131,405.40

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Solution

The fourth proportional to 221,218.20, 331,827.30 and 131,405.40 is: 197,108.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,218.20 : 331,827.30 = 131,405.40 : x
  2. Step 2: Convert to fraction form
    221,218.20/331,827.30 = 131,405.40/x
  3. Step 3: Cross multiply
    221,218.20x = 331,827.30 × 131,405.40
  4. Step 4: Simplify right side
    221,218.20x = 43,603,899,087.42
  5. Step 5: Solve for x
    x = 43,603,899,087.42/221,218.20
  6. Step 6: Final answer
    x = 197,108.10

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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.