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Finding the Fourth Proportional to 769,978.91, 1,062,593.44 and 425,825.30

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Solution

The fourth proportional to 769,978.91, 1,062,593.44 and 425,825.30 is: 587,651.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,978.91 : 1,062,593.44 = 425,825.30 : x
  2. Step 2: Convert to fraction form
    769,978.91/1,062,593.44 = 425,825.30/x
  3. Step 3: Cross multiply
    769,978.91x = 1,062,593.44 × 425,825.30
  4. Step 4: Simplify right side
    769,978.91x = 452,479,171,957.95
  5. Step 5: Solve for x
    x = 452,479,171,957.95/769,978.91
  6. Step 6: Final answer
    x = 587,651.38

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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.