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Finding the Fourth Proportional to 643,937.40, 965,906.10 and 223,213.32

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Solution

The fourth proportional to 643,937.40, 965,906.10 and 223,213.32 is: 334,819.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,937.40 : 965,906.10 = 223,213.32 : x
  2. Step 2: Convert to fraction form
    643,937.40/965,906.10 = 223,213.32/x
  3. Step 3: Cross multiply
    643,937.40x = 965,906.10 × 223,213.32
  4. Step 4: Simplify right side
    643,937.40x = 215,603,107,389.25
  5. Step 5: Solve for x
    x = 215,603,107,389.25/643,937.40
  6. Step 6: Final answer
    x = 334,819.98

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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.