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Finding the Fourth Proportional to 394,525,069.20, 553,544,420.40 and 394,525,069.20

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Solution

The fourth proportional to 394,525,069.20, 553,544,420.40 and 394,525,069.20 is: 553,544,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,525,069.20 : 553,544,420.40 = 394,525,069.20 : x
  2. Step 2: Convert to fraction form
    394,525,069.20/553,544,420.40 = 394,525,069.20/x
  3. Step 3: Cross multiply
    394,525,069.20x = 553,544,420.40 × 394,525,069.20
  4. Step 4: Simplify right side
    394,525,069.20x = 218,387,150,763,583,872
  5. Step 5: Solve for x
    x = 218,387,150,763,583,872/394,525,069.20
  6. Step 6: Final answer
    x = 553,544,420.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.