Home / 678,621,221.80-1,018,230,431.10-314,928,370.60

Finding the Fourth Proportional to 678,621,221.80, 1,018,230,431.10 and 314,928,370.60

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Solution

The fourth proportional to 678,621,221.80, 1,018,230,431.10 and 314,928,370.60 is: 472,531,126.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,621,221.80 : 1,018,230,431.10 = 314,928,370.60 : x
  2. Step 2: Convert to fraction form
    678,621,221.80/1,018,230,431.10 = 314,928,370.60/x
  3. Step 3: Cross multiply
    678,621,221.80x = 1,018,230,431.10 × 314,928,370.60
  4. Step 4: Simplify right side
    678,621,221.80x = 320,669,650,561,658,624
  5. Step 5: Solve for x
    x = 320,669,650,561,658,624/678,621,221.80
  6. Step 6: Final answer
    x = 472,531,126.73

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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.