Home / 628,143,895.32-866,274,273.78-393,215,972.60

Finding the Fourth Proportional to 628,143,895.32, 866,274,273.78 and 393,215,972.60

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Solution

The fourth proportional to 628,143,895.32, 866,274,273.78 and 393,215,972.60 is: 542,284,791.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,143,895.32 : 866,274,273.78 = 393,215,972.60 : x
  2. Step 2: Convert to fraction form
    628,143,895.32/866,274,273.78 = 393,215,972.60/x
  3. Step 3: Cross multiply
    628,143,895.32x = 866,274,273.78 × 393,215,972.60
  4. Step 4: Simplify right side
    628,143,895.32x = 340,632,881,102,761,408
  5. Step 5: Solve for x
    x = 340,632,881,102,761,408/628,143,895.32
  6. Step 6: Final answer
    x = 542,284,791.18

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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.