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Finding the Fourth Proportional to 643,361.40, 965,276.10 and 222,679.80

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Solution

The fourth proportional to 643,361.40, 965,276.10 and 222,679.80 is: 334,100.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,361.40 : 965,276.10 = 222,679.80 : x
  2. Step 2: Convert to fraction form
    643,361.40/965,276.10 = 222,679.80/x
  3. Step 3: Cross multiply
    643,361.40x = 965,276.10 × 222,679.80
  4. Step 4: Simplify right side
    643,361.40x = 214,947,488,892.78
  5. Step 5: Solve for x
    x = 214,947,488,892.78/643,361.40
  6. Step 6: Final answer
    x = 334,100.69

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1.5x scale

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.