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Finding the Fourth Proportional to 699,891,596.80, 965,858,508.48 and 386,619,320.32

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Solution

The fourth proportional to 699,891,596.80, 965,858,508.48 and 386,619,320.32 is: 533,539,139.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,891,596.80 : 965,858,508.48 = 386,619,320.32 : x
  2. Step 2: Convert to fraction form
    699,891,596.80/965,858,508.48 = 386,619,320.32/x
  3. Step 3: Cross multiply
    699,891,596.80x = 965,858,508.48 × 386,619,320.32
  4. Step 4: Simplify right side
    699,891,596.80x = 373,419,560,073,826,560
  5. Step 5: Solve for x
    x = 373,419,560,073,826,560/699,891,596.80
  6. Step 6: Final answer
    x = 533,539,139.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.