Home / 428,924,806.09-643,093,487.34-218,428,031.55

Finding the Fourth Proportional to 428,924,806.09, 643,093,487.34 and 218,428,031.55

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Solution

The fourth proportional to 428,924,806.09, 643,093,487.34 and 218,428,031.55 is: 327,492,470.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,924,806.09 : 643,093,487.34 = 218,428,031.55 : x
  2. Step 2: Convert to fraction form
    428,924,806.09/643,093,487.34 = 218,428,031.55/x
  3. Step 3: Cross multiply
    428,924,806.09x = 643,093,487.34 × 218,428,031.55
  4. Step 4: Simplify right side
    428,924,806.09x = 140,469,644,542,301,056
  5. Step 5: Solve for x
    x = 140,469,644,542,301,056/428,924,806.09
  6. Step 6: Final answer
    x = 327,492,470.82

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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.