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Finding the Fourth Proportional to 639,448.65, 959,082.26 and 218,663.37

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Solution

The fourth proportional to 639,448.65, 959,082.26 and 218,663.37 is: 327,964.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,448.65 : 959,082.26 = 218,663.37 : x
  2. Step 2: Convert to fraction form
    639,448.65/959,082.26 = 218,663.37/x
  3. Step 3: Cross multiply
    639,448.65x = 959,082.26 × 218,663.37
  4. Step 4: Simplify right side
    639,448.65x = 209,716,157,985.50
  5. Step 5: Solve for x
    x = 209,716,157,985.50/639,448.65
  6. Step 6: Final answer
    x = 327,964.03

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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.