Home / 660,519,081.40-990,778,622.10-200,456,512.60

Finding the Fourth Proportional to 660,519,081.40, 990,778,622.10 and 200,456,512.60

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Solution

The fourth proportional to 660,519,081.40, 990,778,622.10 and 200,456,512.60 is: 300,684,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,519,081.40 : 990,778,622.10 = 200,456,512.60 : x
  2. Step 2: Convert to fraction form
    660,519,081.40/990,778,622.10 = 200,456,512.60/x
  3. Step 3: Cross multiply
    660,519,081.40x = 990,778,622.10 × 200,456,512.60
  4. Step 4: Simplify right side
    660,519,081.40x = 198,608,027,344,799,296
  5. Step 5: Solve for x
    x = 198,608,027,344,799,296/660,519,081.40
  6. Step 6: Final answer
    x = 300,684,768.90

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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.