Home / 678,563.20-1,018,233.60-258,140.80

Finding the Fourth Proportional to 678,563.20, 1,018,233.60 and 258,140.80

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Solution

The fourth proportional to 678,563.20, 1,018,233.60 and 258,140.80 is: 387,359.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,563.20 : 1,018,233.60 = 258,140.80 : x
  2. Step 2: Convert to fraction form
    678,563.20/1,018,233.60 = 258,140.80/x
  3. Step 3: Cross multiply
    678,563.20x = 1,018,233.60 × 258,140.80
  4. Step 4: Simplify right side
    678,563.20x = 262,847,636,090.88
  5. Step 5: Solve for x
    x = 262,847,636,090.88/678,563.20
  6. Step 6: Final answer
    x = 387,359.11

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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.