Home / 660,520,007.40-990,780,011.10-200,457,438.60

Finding the Fourth Proportional to 660,520,007.40, 990,780,011.10 and 200,457,438.60

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Solution

The fourth proportional to 660,520,007.40, 990,780,011.10 and 200,457,438.60 is: 300,686,157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,520,007.40 : 990,780,011.10 = 200,457,438.60 : x
  2. Step 2: Convert to fraction form
    660,520,007.40/990,780,011.10 = 200,457,438.60/x
  3. Step 3: Cross multiply
    660,520,007.40x = 990,780,011.10 × 200,457,438.60
  4. Step 4: Simplify right side
    660,520,007.40x = 198,609,223,241,185,568
  5. Step 5: Solve for x
    x = 198,609,223,241,185,568/660,520,007.40
  6. Step 6: Final answer
    x = 300,686,157.90

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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.