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Finding the Fourth Proportional to 872,888,616.69, 1,309,578,568.88 and 381,645,026.61

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Solution

The fourth proportional to 872,888,616.69, 1,309,578,568.88 and 381,645,026.61 is: 572,574,940.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,888,616.69 : 1,309,578,568.88 = 381,645,026.61 : x
  2. Step 2: Convert to fraction form
    872,888,616.69/1,309,578,568.88 = 381,645,026.61/x
  3. Step 3: Cross multiply
    872,888,616.69x = 1,309,578,568.88 × 381,645,026.61
  4. Step 4: Simplify right side
    872,888,616.69x = 499,794,147,766,185,088
  5. Step 5: Solve for x
    x = 499,794,147,766,185,088/872,888,616.69
  6. Step 6: Final answer
    x = 572,574,940.50

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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.