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Finding the Fourth Proportional to 343,874,209.80, 515,811,314.70 and 221,430,203.40

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Solution

The fourth proportional to 343,874,209.80, 515,811,314.70 and 221,430,203.40 is: 332,145,305.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,874,209.80 : 515,811,314.70 = 221,430,203.40 : x
  2. Step 2: Convert to fraction form
    343,874,209.80/515,811,314.70 = 221,430,203.40/x
  3. Step 3: Cross multiply
    343,874,209.80x = 515,811,314.70 × 221,430,203.40
  4. Step 4: Simplify right side
    343,874,209.80x = 114,216,204,330,042,416
  5. Step 5: Solve for x
    x = 114,216,204,330,042,416/343,874,209.80
  6. Step 6: Final answer
    x = 332,145,305.10

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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.