Home / 812,885.88-1,219,745.16-386,903.64

Finding the Fourth Proportional to 812,885.88, 1,219,745.16 and 386,903.64

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Solution

The fourth proportional to 812,885.88, 1,219,745.16 and 386,903.64 is: 580,553.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,885.88 : 1,219,745.16 = 386,903.64 : x
  2. Step 2: Convert to fraction form
    812,885.88/1,219,745.16 = 386,903.64/x
  3. Step 3: Cross multiply
    812,885.88x = 1,219,745.16 × 386,903.64
  4. Step 4: Simplify right side
    812,885.88x = 471,923,842,276.38
  5. Step 5: Solve for x
    x = 471,923,842,276.38/812,885.88
  6. Step 6: Final answer
    x = 580,553.62

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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.