Home / 678,121.20-1,017,181.80-394,297.20

Finding the Fourth Proportional to 678,121.20, 1,017,181.80 and 394,297.20

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Solution

The fourth proportional to 678,121.20, 1,017,181.80 and 394,297.20 is: 591,445.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,121.20 : 1,017,181.80 = 394,297.20 : x
  2. Step 2: Convert to fraction form
    678,121.20/1,017,181.80 = 394,297.20/x
  3. Step 3: Cross multiply
    678,121.20x = 1,017,181.80 × 394,297.20
  4. Step 4: Simplify right side
    678,121.20x = 401,071,935,630.96
  5. Step 5: Solve for x
    x = 401,071,935,630.96/678,121.20
  6. Step 6: Final answer
    x = 591,445.80

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Similar ratio
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1.5x scale

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.