Home / 393,220.78-542,589.13-221,114.81

Finding the Fourth Proportional to 393,220.78, 542,589.13 and 221,114.81

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Solution

The fourth proportional to 393,220.78, 542,589.13 and 221,114.81 is: 305,107.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,220.78 : 542,589.13 = 221,114.81 : x
  2. Step 2: Convert to fraction form
    393,220.78/542,589.13 = 221,114.81/x
  3. Step 3: Cross multiply
    393,220.78x = 542,589.13 × 221,114.81
  4. Step 4: Simplify right side
    393,220.78x = 119,974,494,020.88
  5. Step 5: Solve for x
    x = 119,974,494,020.88/393,220.78
  6. Step 6: Final answer
    x = 305,107.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.