Home / 678,187.20-1,017,280.80-394,363.20

Finding the Fourth Proportional to 678,187.20, 1,017,280.80 and 394,363.20

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Solution

The fourth proportional to 678,187.20, 1,017,280.80 and 394,363.20 is: 591,544.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,187.20 : 1,017,280.80 = 394,363.20 : x
  2. Step 2: Convert to fraction form
    678,187.20/1,017,280.80 = 394,363.20/x
  3. Step 3: Cross multiply
    678,187.20x = 1,017,280.80 × 394,363.20
  4. Step 4: Simplify right side
    678,187.20x = 401,178,111,586.56
  5. Step 5: Solve for x
    x = 401,178,111,586.56/678,187.20
  6. Step 6: Final answer
    x = 591,544.80

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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.