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Finding the Fourth Proportional to 660,509,216.40, 990,763,824.60 and 200,446,647.60

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Solution

The fourth proportional to 660,509,216.40, 990,763,824.60 and 200,446,647.60 is: 300,669,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,509,216.40 : 990,763,824.60 = 200,446,647.60 : x
  2. Step 2: Convert to fraction form
    660,509,216.40/990,763,824.60 = 200,446,647.60/x
  3. Step 3: Cross multiply
    660,509,216.40x = 990,763,824.60 × 200,446,647.60
  4. Step 4: Simplify right side
    660,509,216.40x = 198,595,287,204,424,416
  5. Step 5: Solve for x
    x = 198,595,287,204,424,416/660,509,216.40
  6. Step 6: Final answer
    x = 300,669,971.40

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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.