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Finding the Fourth Proportional to 412,330.80, 618,496.20 and 318,903.60

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Solution

The fourth proportional to 412,330.80, 618,496.20 and 318,903.60 is: 478,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,330.80 : 618,496.20 = 318,903.60 : x
  2. Step 2: Convert to fraction form
    412,330.80/618,496.20 = 318,903.60/x
  3. Step 3: Cross multiply
    412,330.80x = 618,496.20 × 318,903.60
  4. Step 4: Simplify right side
    412,330.80x = 197,240,664,766.32
  5. Step 5: Solve for x
    x = 197,240,664,766.32/412,330.80
  6. Step 6: Final answer
    x = 478,355.40

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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.