Home / 412,991,999.80-619,487,999.70-289,372,262.20

Finding the Fourth Proportional to 412,991,999.80, 619,487,999.70 and 289,372,262.20

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Solution

The fourth proportional to 412,991,999.80, 619,487,999.70 and 289,372,262.20 is: 434,058,393.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,991,999.80 : 619,487,999.70 = 289,372,262.20 : x
  2. Step 2: Convert to fraction form
    412,991,999.80/619,487,999.70 = 289,372,262.20/x
  3. Step 3: Cross multiply
    412,991,999.80x = 619,487,999.70 × 289,372,262.20
  4. Step 4: Simplify right side
    412,991,999.80x = 179,262,643,878,941,920
  5. Step 5: Solve for x
    x = 179,262,643,878,941,920/412,991,999.80
  6. Step 6: Final answer
    x = 434,058,393.30

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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.