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Finding the Fourth Proportional to 343,874,410.80, 515,811,616.20 and 221,430,404.40

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Solution

The fourth proportional to 343,874,410.80, 515,811,616.20 and 221,430,404.40 is: 332,145,606.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,874,410.80 : 515,811,616.20 = 221,430,404.40 : x
  2. Step 2: Convert to fraction form
    343,874,410.80/515,811,616.20 = 221,430,404.40/x
  3. Step 3: Cross multiply
    343,874,410.80x = 515,811,616.20 × 221,430,404.40
  4. Step 4: Simplify right side
    343,874,410.80x = 114,216,374,769,383,584
  5. Step 5: Solve for x
    x = 114,216,374,769,383,584/343,874,410.80
  6. Step 6: Final answer
    x = 332,145,606.60

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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.