Home / 421,848,007.20-632,772,010.80-378,907,574.40

Finding the Fourth Proportional to 421,848,007.20, 632,772,010.80 and 378,907,574.40

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Solution

The fourth proportional to 421,848,007.20, 632,772,010.80 and 378,907,574.40 is: 568,361,361.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,848,007.20 : 632,772,010.80 = 378,907,574.40 : x
  2. Step 2: Convert to fraction form
    421,848,007.20/632,772,010.80 = 378,907,574.40/x
  3. Step 3: Cross multiply
    421,848,007.20x = 632,772,010.80 × 378,907,574.40
  4. Step 4: Simplify right side
    421,848,007.20x = 239,762,107,760,438,560
  5. Step 5: Solve for x
    x = 239,762,107,760,438,560/421,848,007.20
  6. Step 6: Final answer
    x = 568,361,361.60

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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.