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Finding the Fourth Proportional to 643,395.79, 965,241.94 and 222,671.66

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Solution

The fourth proportional to 643,395.79, 965,241.94 and 222,671.66 is: 334,058.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,395.79 : 965,241.94 = 222,671.66 : x
  2. Step 2: Convert to fraction form
    643,395.79/965,241.94 = 222,671.66/x
  3. Step 3: Cross multiply
    643,395.79x = 965,241.94 × 222,671.66
  4. Step 4: Simplify right side
    643,395.79x = 214,932,025,081.42
  5. Step 5: Solve for x
    x = 214,932,025,081.42/643,395.79
  6. Step 6: Final answer
    x = 334,058.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.