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Finding the Fourth Proportional to 861,795,453.66, 1,292,874,756.33 and 279,484,293.90

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Solution

The fourth proportional to 861,795,453.66, 1,292,874,756.33 and 279,484,293.90 is: 419,285,326.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,795,453.66 : 1,292,874,756.33 = 279,484,293.90 : x
  2. Step 2: Convert to fraction form
    861,795,453.66/1,292,874,756.33 = 279,484,293.90/x
  3. Step 3: Cross multiply
    861,795,453.66x = 1,292,874,756.33 × 279,484,293.90
  4. Step 4: Simplify right side
    861,795,453.66x = 361,338,188,374,024,576
  5. Step 5: Solve for x
    x = 361,338,188,374,024,576/861,795,453.66
  6. Step 6: Final answer
    x = 419,285,326.74

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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.