Home / 660,520,121.40-990,780,182.10-200,457,552.60

Finding the Fourth Proportional to 660,520,121.40, 990,780,182.10 and 200,457,552.60

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Solution

The fourth proportional to 660,520,121.40, 990,780,182.10 and 200,457,552.60 is: 300,686,328.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,520,121.40 : 990,780,182.10 = 200,457,552.60 : x
  2. Step 2: Convert to fraction form
    660,520,121.40/990,780,182.10 = 200,457,552.60/x
  3. Step 3: Cross multiply
    660,520,121.40x = 990,780,182.10 × 200,457,552.60
  4. Step 4: Simplify right side
    660,520,121.40x = 198,609,370,468,348,320
  5. Step 5: Solve for x
    x = 198,609,370,468,348,320/660,520,121.40
  6. Step 6: Final answer
    x = 300,686,328.90

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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.