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Finding the Fourth Proportional to 412,335.60, 618,503.40 and 131,881.20

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Solution

The fourth proportional to 412,335.60, 618,503.40 and 131,881.20 is: 197,821.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,335.60 : 618,503.40 = 131,881.20 : x
  2. Step 2: Convert to fraction form
    412,335.60/618,503.40 = 131,881.20/x
  3. Step 3: Cross multiply
    412,335.60x = 618,503.40 × 131,881.20
  4. Step 4: Simplify right side
    412,335.60x = 81,568,970,596.08
  5. Step 5: Solve for x
    x = 81,568,970,596.08/412,335.60
  6. Step 6: Final answer
    x = 197,821.80

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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.