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Finding the Fourth Proportional to 664,852,217.70, 997,278,326.55 and 389,353,203.30

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Solution

The fourth proportional to 664,852,217.70, 997,278,326.55 and 389,353,203.30 is: 584,029,804.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,852,217.70 : 997,278,326.55 = 389,353,203.30 : x
  2. Step 2: Convert to fraction form
    664,852,217.70/997,278,326.55 = 389,353,203.30/x
  3. Step 3: Cross multiply
    664,852,217.70x = 997,278,326.55 × 389,353,203.30
  4. Step 4: Simplify right side
    664,852,217.70x = 388,293,511,023,905,920
  5. Step 5: Solve for x
    x = 388,293,511,023,905,920/664,852,217.70
  6. Step 6: Final answer
    x = 584,029,804.95

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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.