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Finding the Fourth Proportional to 300,309,739.60, 421,038,297.20 and 300,309,739.60

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Solution

The fourth proportional to 300,309,739.60, 421,038,297.20 and 300,309,739.60 is: 421,038,297.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,309,739.60 : 421,038,297.20 = 300,309,739.60 : x
  2. Step 2: Convert to fraction form
    300,309,739.60/421,038,297.20 = 300,309,739.60/x
  3. Step 3: Cross multiply
    300,309,739.60x = 421,038,297.20 × 300,309,739.60
  4. Step 4: Simplify right side
    300,309,739.60x = 126,441,901,393,759,408
  5. Step 5: Solve for x
    x = 126,441,901,393,759,408/300,309,739.60
  6. Step 6: Final answer
    x = 421,038,297.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.