Home / 660,520,190.40-990,780,285.60-200,457,621.60

Finding the Fourth Proportional to 660,520,190.40, 990,780,285.60 and 200,457,621.60

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Solution

The fourth proportional to 660,520,190.40, 990,780,285.60 and 200,457,621.60 is: 300,686,432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,520,190.40 : 990,780,285.60 = 200,457,621.60 : x
  2. Step 2: Convert to fraction form
    660,520,190.40/990,780,285.60 = 200,457,621.60/x
  3. Step 3: Cross multiply
    660,520,190.40x = 990,780,285.60 × 200,457,621.60
  4. Step 4: Simplify right side
    660,520,190.40x = 198,609,459,579,544,736
  5. Step 5: Solve for x
    x = 198,609,459,579,544,736/660,520,190.40
  6. Step 6: Final answer
    x = 300,686,432.40

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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.