Home / 379,642,087.87-523,906,850.31-212,381,142.28

Finding the Fourth Proportional to 379,642,087.87, 523,906,850.31 and 212,381,142.28

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Solution

The fourth proportional to 379,642,087.87, 523,906,850.31 and 212,381,142.28 is: 293,086,406.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,642,087.87 : 523,906,850.31 = 212,381,142.28 : x
  2. Step 2: Convert to fraction form
    379,642,087.87/523,906,850.31 = 212,381,142.28/x
  3. Step 3: Cross multiply
    379,642,087.87x = 523,906,850.31 × 212,381,142.28
  4. Step 4: Simplify right side
    379,642,087.87x = 111,267,935,317,154,768
  5. Step 5: Solve for x
    x = 111,267,935,317,154,768/379,642,087.87
  6. Step 6: Final answer
    x = 293,086,406.57

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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.