Home / 428,924,396.14-643,092,872.63-218,427,620.01

Finding the Fourth Proportional to 428,924,396.14, 643,092,872.63 and 218,427,620.01

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Solution

The fourth proportional to 428,924,396.14, 643,092,872.63 and 218,427,620.01 is: 327,491,853.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,924,396.14 : 643,092,872.63 = 218,427,620.01 : x
  2. Step 2: Convert to fraction form
    428,924,396.14/643,092,872.63 = 218,427,620.01/x
  3. Step 3: Cross multiply
    428,924,396.14x = 643,092,872.63 × 218,427,620.01
  4. Step 4: Simplify right side
    428,924,396.14x = 140,469,245,613,964,960
  5. Step 5: Solve for x
    x = 140,469,245,613,964,960/428,924,396.14
  6. Step 6: Final answer
    x = 327,491,853.76

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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.