Home / 781,778,399.79-1,172,666,609.38-199,512,658.39

Finding the Fourth Proportional to 781,778,399.79, 1,172,666,609.38 and 199,512,658.39

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Solution

The fourth proportional to 781,778,399.79, 1,172,666,609.38 and 199,512,658.39 is: 299,268,734.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,778,399.79 : 1,172,666,609.38 = 199,512,658.39 : x
  2. Step 2: Convert to fraction form
    781,778,399.79/1,172,666,609.38 = 199,512,658.39/x
  3. Step 3: Cross multiply
    781,778,399.79x = 1,172,666,609.38 × 199,512,658.39
  4. Step 4: Simplify right side
    781,778,399.79x = 233,961,832,642,591,520
  5. Step 5: Solve for x
    x = 233,961,832,642,591,520/781,778,399.79
  6. Step 6: Final answer
    x = 299,268,734.86

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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.