Home / 1,218,077,896.79-1,680,903,997.22-689,430,531.67

Finding the Fourth Proportional to 1,218,077,896.79, 1,680,903,997.22 and 689,430,531.67

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Solution

The fourth proportional to 1,218,077,896.79, 1,680,903,997.22 and 689,430,531.67 is: 951,389,512.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,077,896.79 : 1,680,903,997.22 = 689,430,531.67 : x
  2. Step 2: Convert to fraction form
    1,218,077,896.79/1,680,903,997.22 = 689,430,531.67/x
  3. Step 3: Cross multiply
    1,218,077,896.79x = 1,680,903,997.22 × 689,430,531.67
  4. Step 4: Simplify right side
    1,218,077,896.79x = 1,158,866,536,487,134,208
  5. Step 5: Solve for x
    x = 1,158,866,536,487,134,208/1,218,077,896.79
  6. Step 6: Final answer
    x = 951,389,512.56

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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.