Home / 428,355,863.78-590,913,537.04-279,763,963.72

Finding the Fourth Proportional to 428,355,863.78, 590,913,537.04 and 279,763,963.72

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Solution

The fourth proportional to 428,355,863.78, 590,913,537.04 and 279,763,963.72 is: 385,932,182.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,355,863.78 : 590,913,537.04 = 279,763,963.72 : x
  2. Step 2: Convert to fraction form
    428,355,863.78/590,913,537.04 = 279,763,963.72/x
  3. Step 3: Cross multiply
    428,355,863.78x = 590,913,537.04 × 279,763,963.72
  4. Step 4: Simplify right side
    428,355,863.78x = 165,316,313,335,938,720
  5. Step 5: Solve for x
    x = 165,316,313,335,938,720/428,355,863.78
  6. Step 6: Final answer
    x = 385,932,182.36

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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.