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Finding the Fourth Proportional to 343,872,808.80, 515,809,213.20 and 221,428,802.40

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Solution

The fourth proportional to 343,872,808.80, 515,809,213.20 and 221,428,802.40 is: 332,143,203.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,872,808.80 : 515,809,213.20 = 221,428,802.40 : x
  2. Step 2: Convert to fraction form
    343,872,808.80/515,809,213.20 = 221,428,802.40/x
  3. Step 3: Cross multiply
    343,872,808.80x = 515,809,213.20 × 221,428,802.40
  4. Step 4: Simplify right side
    343,872,808.80x = 114,215,016,345,762,272
  5. Step 5: Solve for x
    x = 114,215,016,345,762,272/343,872,808.80
  6. Step 6: Final answer
    x = 332,143,203.60

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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.