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Finding the Fourth Proportional to 279,937,336.80, 419,906,005.20 and 157,493,330.40

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Solution

The fourth proportional to 279,937,336.80, 419,906,005.20 and 157,493,330.40 is: 236,239,995.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,937,336.80 : 419,906,005.20 = 157,493,330.40 : x
  2. Step 2: Convert to fraction form
    279,937,336.80/419,906,005.20 = 157,493,330.40/x
  3. Step 3: Cross multiply
    279,937,336.80x = 419,906,005.20 × 157,493,330.40
  4. Step 4: Simplify right side
    279,937,336.80x = 66,132,395,213,907,720
  5. Step 5: Solve for x
    x = 66,132,395,213,907,720/279,937,336.80
  6. Step 6: Final answer
    x = 236,239,995.60

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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.