Home / 279,936,689.40-419,905,034.10-256,128,132.60

Finding the Fourth Proportional to 279,936,689.40, 419,905,034.10 and 256,128,132.60

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Solution

The fourth proportional to 279,936,689.40, 419,905,034.10 and 256,128,132.60 is: 384,192,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,689.40 : 419,905,034.10 = 256,128,132.60 : x
  2. Step 2: Convert to fraction form
    279,936,689.40/419,905,034.10 = 256,128,132.60/x
  3. Step 3: Cross multiply
    279,936,689.40x = 419,905,034.10 × 256,128,132.60
  4. Step 4: Simplify right side
    279,936,689.40x = 107,549,492,253,372,320
  5. Step 5: Solve for x
    x = 107,549,492,253,372,320/279,936,689.40
  6. Step 6: Final answer
    x = 384,192,198.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.