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Finding the Fourth Proportional to 861,795,418.80, 1,292,874,703.88 and 279,484,258.88

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Solution

The fourth proportional to 861,795,418.80, 1,292,874,703.88 and 279,484,258.88 is: 419,285,274.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,795,418.80 : 1,292,874,703.88 = 279,484,258.88 : x
  2. Step 2: Convert to fraction form
    861,795,418.80/1,292,874,703.88 = 279,484,258.88/x
  3. Step 3: Cross multiply
    861,795,418.80x = 1,292,874,703.88 × 279,484,258.88
  4. Step 4: Simplify right side
    861,795,418.80x = 361,338,128,430,739,456
  5. Step 5: Solve for x
    x = 361,338,128,430,739,456/861,795,418.80
  6. Step 6: Final answer
    x = 419,285,274.15

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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.