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Finding the Fourth Proportional to 412,334.80, 618,502.20 and 318,907.60

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Solution

The fourth proportional to 412,334.80, 618,502.20 and 318,907.60 is: 478,361.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,334.80 : 618,502.20 = 318,907.60 : x
  2. Step 2: Convert to fraction form
    412,334.80/618,502.20 = 318,907.60/x
  3. Step 3: Cross multiply
    412,334.80x = 618,502.20 × 318,907.60
  4. Step 4: Simplify right side
    412,334.80x = 197,245,052,196.72
  5. Step 5: Solve for x
    x = 197,245,052,196.72/412,334.80
  6. Step 6: Final answer
    x = 478,361.40

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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.