Home / 411,589.20-618,420.60-261,901.20

Finding the Fourth Proportional to 411,589.20, 618,420.60 and 261,901.20

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Solution

The fourth proportional to 411,589.20, 618,420.60 and 261,901.20 is: 393,511.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,589.20 : 618,420.60 = 261,901.20 : x
  2. Step 2: Convert to fraction form
    411,589.20/618,420.60 = 261,901.20/x
  3. Step 3: Cross multiply
    411,589.20x = 618,420.60 × 261,901.20
  4. Step 4: Simplify right side
    411,589.20x = 161,965,097,244.72
  5. Step 5: Solve for x
    x = 161,965,097,244.72/411,589.20
  6. Step 6: Final answer
    x = 393,511.53

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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.