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Finding the Fourth Proportional to 368,802,506.80, 553,203,760.20 and 347,639,345.20

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Solution

The fourth proportional to 368,802,506.80, 553,203,760.20 and 347,639,345.20 is: 521,459,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,802,506.80 : 553,203,760.20 = 347,639,345.20 : x
  2. Step 2: Convert to fraction form
    368,802,506.80/553,203,760.20 = 347,639,345.20/x
  3. Step 3: Cross multiply
    368,802,506.80x = 553,203,760.20 × 347,639,345.20
  4. Step 4: Simplify right side
    368,802,506.80x = 192,315,392,958,105,824
  5. Step 5: Solve for x
    x = 192,315,392,958,105,824/368,802,506.80
  6. Step 6: Final answer
    x = 521,459,017.80

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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.