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Finding the Fourth Proportional to 412,084.80, 618,127.20 and 318,657.60

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Solution

The fourth proportional to 412,084.80, 618,127.20 and 318,657.60 is: 477,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,084.80 : 618,127.20 = 318,657.60 : x
  2. Step 2: Convert to fraction form
    412,084.80/618,127.20 = 318,657.60/x
  3. Step 3: Cross multiply
    412,084.80x = 618,127.20 × 318,657.60
  4. Step 4: Simplify right side
    412,084.80x = 196,970,930,046.72
  5. Step 5: Solve for x
    x = 196,970,930,046.72/412,084.80
  6. Step 6: Final answer
    x = 477,986.40

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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.