Home / 826,719,743.78-1,239,649,025.44-389,903,142.43

Finding the Fourth Proportional to 826,719,743.78, 1,239,649,025.44 and 389,903,142.43

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Solution

The fourth proportional to 826,719,743.78, 1,239,649,025.44 and 389,903,142.43 is: 584,651,635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,719,743.78 : 1,239,649,025.44 = 389,903,142.43 : x
  2. Step 2: Convert to fraction form
    826,719,743.78/1,239,649,025.44 = 389,903,142.43/x
  3. Step 3: Cross multiply
    826,719,743.78x = 1,239,649,025.44 × 389,903,142.43
  4. Step 4: Simplify right side
    826,719,743.78x = 483,343,050,529,343,040
  5. Step 5: Solve for x
    x = 483,343,050,529,343,040/826,719,743.78
  6. Step 6: Final answer
    x = 584,651,635.78

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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.