Home / 660,190,400.40-990,285,600.60-354,080,384.40

Finding the Fourth Proportional to 660,190,400.40, 990,285,600.60 and 354,080,384.40

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Solution

The fourth proportional to 660,190,400.40, 990,285,600.60 and 354,080,384.40 is: 531,120,576.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,190,400.40 : 990,285,600.60 = 354,080,384.40 : x
  2. Step 2: Convert to fraction form
    660,190,400.40/990,285,600.60 = 354,080,384.40/x
  3. Step 3: Cross multiply
    660,190,400.40x = 990,285,600.60 × 354,080,384.40
  4. Step 4: Simplify right side
    660,190,400.40x = 350,640,706,126,232,832
  5. Step 5: Solve for x
    x = 350,640,706,126,232,832/660,190,400.40
  6. Step 6: Final answer
    x = 531,120,576.60

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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.