Home / 643,972,453.60-965,958,680.40-213,150,949.60

Finding the Fourth Proportional to 643,972,453.60, 965,958,680.40 and 213,150,949.60

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Solution

The fourth proportional to 643,972,453.60, 965,958,680.40 and 213,150,949.60 is: 319,726,424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,972,453.60 : 965,958,680.40 = 213,150,949.60 : x
  2. Step 2: Convert to fraction form
    643,972,453.60/965,958,680.40 = 213,150,949.60/x
  3. Step 3: Cross multiply
    643,972,453.60x = 965,958,680.40 × 213,150,949.60
  4. Step 4: Simplify right side
    643,972,453.60x = 205,895,010,001,622,912
  5. Step 5: Solve for x
    x = 205,895,010,001,622,912/643,972,453.60
  6. Step 6: Final answer
    x = 319,726,424.40

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Double scale
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Similar ratio
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1.5x scale

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.