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Finding the Fourth Proportional to 769,431.91, 1,061,871 and 425,260.42

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Solution

The fourth proportional to 769,431.91, 1,061,871 and 425,260.42 is: 586,889.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,431.91 : 1,061,871 = 425,260.42 : x
  2. Step 2: Convert to fraction form
    769,431.91/1,061,871 = 425,260.42/x
  3. Step 3: Cross multiply
    769,431.91x = 1,061,871 × 425,260.42
  4. Step 4: Simplify right side
    769,431.91x = 451,571,707,445.82
  5. Step 5: Solve for x
    x = 451,571,707,445.82/769,431.91
  6. Step 6: Final answer
    x = 586,889.76

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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.