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Finding the Fourth Proportional to 660,502,572.40, 990,753,858.60 and 200,440,003.60

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Solution

The fourth proportional to 660,502,572.40, 990,753,858.60 and 200,440,003.60 is: 300,660,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,502,572.40 : 990,753,858.60 = 200,440,003.60 : x
  2. Step 2: Convert to fraction form
    660,502,572.40/990,753,858.60 = 200,440,003.60/x
  3. Step 3: Cross multiply
    660,502,572.40x = 990,753,858.60 × 200,440,003.60
  4. Step 4: Simplify right side
    660,502,572.40x = 198,586,706,984,497,888
  5. Step 5: Solve for x
    x = 198,586,706,984,497,888/660,502,572.40
  6. Step 6: Final answer
    x = 300,660,005.40

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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.