Home / 431,325.40-647,085.30-131,819.80

Finding the Fourth Proportional to 431,325.40, 647,085.30 and 131,819.80

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Solution

The fourth proportional to 431,325.40, 647,085.30 and 131,819.80 is: 197,759.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,325.40 : 647,085.30 = 131,819.80 : x
  2. Step 2: Convert to fraction form
    431,325.40/647,085.30 = 131,819.80/x
  3. Step 3: Cross multiply
    431,325.40x = 647,085.30 × 131,819.80
  4. Step 4: Simplify right side
    431,325.40x = 85,298,654,828.94
  5. Step 5: Solve for x
    x = 85,298,654,828.94/431,325.40
  6. Step 6: Final answer
    x = 197,759.41

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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.