Home / 678,641.80-1,017,962.70-394,040.20

Finding the Fourth Proportional to 678,641.80, 1,017,962.70 and 394,040.20

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Solution

The fourth proportional to 678,641.80, 1,017,962.70 and 394,040.20 is: 591,060.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,641.80 : 1,017,962.70 = 394,040.20 : x
  2. Step 2: Convert to fraction form
    678,641.80/1,017,962.70 = 394,040.20/x
  3. Step 3: Cross multiply
    678,641.80x = 1,017,962.70 × 394,040.20
  4. Step 4: Simplify right side
    678,641.80x = 401,118,225,900.54
  5. Step 5: Solve for x
    x = 401,118,225,900.54/678,641.80
  6. Step 6: Final answer
    x = 591,060.30

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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.