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Finding the Fourth Proportional to 425,495,863.40, 638,264,790.30 and 221,422,519.40

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Solution

The fourth proportional to 425,495,863.40, 638,264,790.30 and 221,422,519.40 is: 332,144,704.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,495,863.40 : 638,264,790.30 = 221,422,519.40 : x
  2. Step 2: Convert to fraction form
    425,495,863.40/638,264,790.30 = 221,422,519.40/x
  3. Step 3: Cross multiply
    425,495,863.40x = 638,264,790.30 × 221,422,519.40
  4. Step 4: Simplify right side
    425,495,863.40x = 141,326,197,912,538,672
  5. Step 5: Solve for x
    x = 141,326,197,912,538,672/425,495,863.40
  6. Step 6: Final answer
    x = 332,144,704.73

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