Home / 706,123,200.78-974,458,941.21-388,619,991.24

Finding the Fourth Proportional to 706,123,200.78, 974,458,941.21 and 388,619,991.24

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Solution

The fourth proportional to 706,123,200.78, 974,458,941.21 and 388,619,991.24 is: 536,300,499.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,123,200.78 : 974,458,941.21 = 388,619,991.24 : x
  2. Step 2: Convert to fraction form
    706,123,200.78/974,458,941.21 = 388,619,991.24/x
  3. Step 3: Cross multiply
    706,123,200.78x = 974,458,941.21 × 388,619,991.24
  4. Step 4: Simplify right side
    706,123,200.78x = 378,694,225,196,769,920
  5. Step 5: Solve for x
    x = 378,694,225,196,769,920/706,123,200.78
  6. Step 6: Final answer
    x = 536,300,499.37

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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.