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Finding the Fourth Proportional to 218,843.40, 328,265.10 and 71,099.40

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Solution

The fourth proportional to 218,843.40, 328,265.10 and 71,099.40 is: 106,649.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,843.40 : 328,265.10 = 71,099.40 : x
  2. Step 2: Convert to fraction form
    218,843.40/328,265.10 = 71,099.40/x
  3. Step 3: Cross multiply
    218,843.40x = 328,265.10 × 71,099.40
  4. Step 4: Simplify right side
    218,843.40x = 23,339,451,650.94
  5. Step 5: Solve for x
    x = 23,339,451,650.94/218,843.40
  6. Step 6: Final answer
    x = 106,649.10

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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.