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Finding the Fourth Proportional to 392,786.10, 542,039.90 and 223,009.29

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Solution

The fourth proportional to 392,786.10, 542,039.90 and 223,009.29 is: 307,750.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,786.10 : 542,039.90 = 223,009.29 : x
  2. Step 2: Convert to fraction form
    392,786.10/542,039.90 = 223,009.29/x
  3. Step 3: Cross multiply
    392,786.10x = 542,039.90 × 223,009.29
  4. Step 4: Simplify right side
    392,786.10x = 120,879,932,135.63
  5. Step 5: Solve for x
    x = 120,879,932,135.63/392,786.10
  6. Step 6: Final answer
    x = 307,750.03

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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.