Home / 812,469,485.76-1,121,191,876.26-477,978,158.40

Finding the Fourth Proportional to 812,469,485.76, 1,121,191,876.26 and 477,978,158.40

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Solution

The fourth proportional to 812,469,485.76, 1,121,191,876.26 and 477,978,158.40 is: 659,600,437.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,469,485.76 : 1,121,191,876.26 = 477,978,158.40 : x
  2. Step 2: Convert to fraction form
    812,469,485.76/1,121,191,876.26 = 477,978,158.40/x
  3. Step 3: Cross multiply
    812,469,485.76x = 1,121,191,876.26 × 477,978,158.40
  4. Step 4: Simplify right side
    812,469,485.76x = 535,905,228,227,795,456
  5. Step 5: Solve for x
    x = 535,905,228,227,795,456/812,469,485.76
  6. Step 6: Final answer
    x = 659,600,437.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.