Home / 709,978,188.48-979,807,747.20-396,720,006.72

Finding the Fourth Proportional to 709,978,188.48, 979,807,747.20 and 396,720,006.72

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Solution

The fourth proportional to 709,978,188.48, 979,807,747.20 and 396,720,006.72 is: 547,494,757.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,978,188.48 : 979,807,747.20 = 396,720,006.72 : x
  2. Step 2: Convert to fraction form
    709,978,188.48/979,807,747.20 = 396,720,006.72/x
  3. Step 3: Cross multiply
    709,978,188.48x = 979,807,747.20 × 396,720,006.72
  4. Step 4: Simplify right side
    709,978,188.48x = 388,709,336,053,492,096
  5. Step 5: Solve for x
    x = 388,709,336,053,492,096/709,978,188.48
  6. Step 6: Final answer
    x = 547,494,757.39

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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.