Home / 643,624,014.40-965,436,021.60-385,634,996.80

Finding the Fourth Proportional to 643,624,014.40, 965,436,021.60 and 385,634,996.80

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Solution

The fourth proportional to 643,624,014.40, 965,436,021.60 and 385,634,996.80 is: 578,452,495.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,624,014.40 : 965,436,021.60 = 385,634,996.80 : x
  2. Step 2: Convert to fraction form
    643,624,014.40/965,436,021.60 = 385,634,996.80/x
  3. Step 3: Cross multiply
    643,624,014.40x = 965,436,021.60 × 385,634,996.80
  4. Step 4: Simplify right side
    643,624,014.40x = 372,305,917,100,320,768
  5. Step 5: Solve for x
    x = 372,305,917,100,320,768/643,624,014.40
  6. Step 6: Final answer
    x = 578,452,495.20

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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.