Home / 515,642,463.89-711,586,676.93-280,694,907.98

Finding the Fourth Proportional to 515,642,463.89, 711,586,676.93 and 280,694,907.98

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Solution

The fourth proportional to 515,642,463.89, 711,586,676.93 and 280,694,907.98 is: 387,359,014.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,642,463.89 : 711,586,676.93 = 280,694,907.98 : x
  2. Step 2: Convert to fraction form
    515,642,463.89/711,586,676.93 = 280,694,907.98/x
  3. Step 3: Cross multiply
    515,642,463.89x = 711,586,676.93 × 280,694,907.98
  4. Step 4: Simplify right side
    515,642,463.89x = 199,738,756,795,698,944
  5. Step 5: Solve for x
    x = 199,738,756,795,698,944/515,642,463.89
  6. Step 6: Final answer
    x = 387,359,014.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.