Home / 420,275,767.20-628,713,039.60-369,257,431.20

Finding the Fourth Proportional to 420,275,767.20, 628,713,039.60 and 369,257,431.20

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Solution

The fourth proportional to 420,275,767.20, 628,713,039.60 and 369,257,431.20 is: 552,391,977.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,275,767.20 : 628,713,039.60 = 369,257,431.20 : x
  2. Step 2: Convert to fraction form
    420,275,767.20/628,713,039.60 = 369,257,431.20/x
  3. Step 3: Cross multiply
    420,275,767.20x = 628,713,039.60 × 369,257,431.20
  4. Step 4: Simplify right side
    420,275,767.20x = 232,156,961,964,639,872
  5. Step 5: Solve for x
    x = 232,156,961,964,639,872/420,275,767.20
  6. Step 6: Final answer
    x = 552,391,977.09

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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.