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Finding the Fourth Proportional to 643,645.92, 965,607.30 and 217,192.32

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Solution

The fourth proportional to 643,645.92, 965,607.30 and 217,192.32 is: 325,835.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,645.92 : 965,607.30 = 217,192.32 : x
  2. Step 2: Convert to fraction form
    643,645.92/965,607.30 = 217,192.32/x
  3. Step 3: Cross multiply
    643,645.92x = 965,607.30 × 217,192.32
  4. Step 4: Simplify right side
    643,645.92x = 209,722,489,695.94
  5. Step 5: Solve for x
    x = 209,722,489,695.94/643,645.92
  6. Step 6: Final answer
    x = 325,835.19

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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.