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Finding the Fourth Proportional to 659,628,709.60, 989,555,038.80 and 199,563,224.80

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Solution

The fourth proportional to 659,628,709.60, 989,555,038.80 and 199,563,224.80 is: 299,378,713.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,628,709.60 : 989,555,038.80 = 199,563,224.80 : x
  2. Step 2: Convert to fraction form
    659,628,709.60/989,555,038.80 = 199,563,224.80/x
  3. Step 3: Cross multiply
    659,628,709.60x = 989,555,038.80 × 199,563,224.80
  4. Step 4: Simplify right side
    659,628,709.60x = 197,478,794,660,017,120
  5. Step 5: Solve for x
    x = 197,478,794,660,017,120/659,628,709.60
  6. Step 6: Final answer
    x = 299,378,713.79

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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.