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Finding the Fourth Proportional to 412,937.20, 618,628.20 and 212,575.60

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Solution

The fourth proportional to 412,937.20, 618,628.20 and 212,575.60 is: 318,463.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,937.20 : 618,628.20 = 212,575.60 : x
  2. Step 2: Convert to fraction form
    412,937.20/618,628.20 = 212,575.60/x
  3. Step 3: Cross multiply
    412,937.20x = 618,628.20 × 212,575.60
  4. Step 4: Simplify right side
    412,937.20x = 131,505,260,791.92
  5. Step 5: Solve for x
    x = 131,505,260,791.92/412,937.20
  6. Step 6: Final answer
    x = 318,463.10

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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.