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Finding the Fourth Proportional to 769,404.72, 1,061,745.49 and 425,222.87

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Solution

The fourth proportional to 769,404.72, 1,061,745.49 and 425,222.87 is: 586,789.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,404.72 : 1,061,745.49 = 425,222.87 : x
  2. Step 2: Convert to fraction form
    769,404.72/1,061,745.49 = 425,222.87/x
  3. Step 3: Cross multiply
    769,404.72x = 1,061,745.49 × 425,222.87
  4. Step 4: Simplify right side
    769,404.72x = 451,478,457,298.28
  5. Step 5: Solve for x
    x = 451,478,457,298.28/769,404.72
  6. Step 6: Final answer
    x = 586,789.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.