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Finding the Fourth Proportional to 639,566,673.28, 959,204,978.74 and 289,581,698.07

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Solution

The fourth proportional to 639,566,673.28, 959,204,978.74 and 289,581,698.07 is: 434,306,880.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,566,673.28 : 959,204,978.74 = 289,581,698.07 : x
  2. Step 2: Convert to fraction form
    639,566,673.28/959,204,978.74 = 289,581,698.07/x
  3. Step 3: Cross multiply
    639,566,673.28x = 959,204,978.74 × 289,581,698.07
  4. Step 4: Simplify right side
    639,566,673.28x = 277,768,206,540,727,456
  5. Step 5: Solve for x
    x = 277,768,206,540,727,456/639,566,673.28
  6. Step 6: Final answer
    x = 434,306,880.18

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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.