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Finding the Fourth Proportional to 773,719,673.61, 1,067,728,601.68 and 421,294,820.50

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Solution

The fourth proportional to 773,719,673.61, 1,067,728,601.68 and 421,294,820.50 is: 581,384,375.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    773,719,673.61 : 1,067,728,601.68 = 421,294,820.50 : x
  2. Step 2: Convert to fraction form
    773,719,673.61/1,067,728,601.68 = 421,294,820.50/x
  3. Step 3: Cross multiply
    773,719,673.61x = 1,067,728,601.68 × 421,294,820.50
  4. Step 4: Simplify right side
    773,719,673.61x = 449,828,529,587,491,584
  5. Step 5: Solve for x
    x = 449,828,529,587,491,584/773,719,673.61
  6. Step 6: Final answer
    x = 581,384,375.93

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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.