Home / 393,380.43-542,864.19-221,298.51

Finding the Fourth Proportional to 393,380.43, 542,864.19 and 221,298.51

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Solution

The fourth proportional to 393,380.43, 542,864.19 and 221,298.51 is: 305,391.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,380.43 : 542,864.19 = 221,298.51 : x
  2. Step 2: Convert to fraction form
    393,380.43/542,864.19 = 221,298.51/x
  3. Step 3: Cross multiply
    393,380.43x = 542,864.19 × 221,298.51
  4. Step 4: Simplify right side
    393,380.43x = 120,135,036,379.36
  5. Step 5: Solve for x
    x = 120,135,036,379.36/393,380.43
  6. Step 6: Final answer
    x = 305,391.49

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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.