Home / 412,938.20-618,629.70-212,576.60

Finding the Fourth Proportional to 412,938.20, 618,629.70 and 212,576.60

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Solution

The fourth proportional to 412,938.20, 618,629.70 and 212,576.60 is: 318,464.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,938.20 : 618,629.70 = 212,576.60 : x
  2. Step 2: Convert to fraction form
    412,938.20/618,629.70 = 212,576.60/x
  3. Step 3: Cross multiply
    412,938.20x = 618,629.70 × 212,576.60
  4. Step 4: Simplify right side
    412,938.20x = 131,506,198,285.02
  5. Step 5: Solve for x
    x = 131,506,198,285.02/412,938.20
  6. Step 6: Final answer
    x = 318,464.60

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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.