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Finding the Fourth Proportional to 679,892.82, 938,572.94 and 431,659.44

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Solution

The fourth proportional to 679,892.82, 938,572.94 and 431,659.44 is: 595,893.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,892.82 : 938,572.94 = 431,659.44 : x
  2. Step 2: Convert to fraction form
    679,892.82/938,572.94 = 431,659.44/x
  3. Step 3: Cross multiply
    679,892.82x = 938,572.94 × 431,659.44
  4. Step 4: Simplify right side
    679,892.82x = 405,143,870,758.70
  5. Step 5: Solve for x
    x = 405,143,870,758.70/679,892.82
  6. Step 6: Final answer
    x = 595,893.74

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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.