Home / 643,643.92-965,604.31-217,190.33

Finding the Fourth Proportional to 643,643.92, 965,604.31 and 217,190.33

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Solution

The fourth proportional to 643,643.92, 965,604.31 and 217,190.33 is: 325,832.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,643.92 : 965,604.31 = 217,190.33 : x
  2. Step 2: Convert to fraction form
    643,643.92/965,604.31 = 217,190.33/x
  3. Step 3: Cross multiply
    643,643.92x = 965,604.31 × 217,190.33
  4. Step 4: Simplify right side
    643,643.92x = 209,719,916,988.34
  5. Step 5: Solve for x
    x = 209,719,916,988.34/643,643.92
  6. Step 6: Final answer
    x = 325,832.20

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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.