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Finding the Fourth Proportional to 343,873,241.80, 515,809,862.70 and 221,429,235.40

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Solution

The fourth proportional to 343,873,241.80, 515,809,862.70 and 221,429,235.40 is: 332,143,853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,873,241.80 : 515,809,862.70 = 221,429,235.40 : x
  2. Step 2: Convert to fraction form
    343,873,241.80/515,809,862.70 = 221,429,235.40/x
  3. Step 3: Cross multiply
    343,873,241.80x = 515,809,862.70 × 221,429,235.40
  4. Step 4: Simplify right side
    343,873,241.80x = 114,215,383,509,439,984
  5. Step 5: Solve for x
    x = 114,215,383,509,439,984/343,873,241.80
  6. Step 6: Final answer
    x = 332,143,853.10

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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.