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Finding the Fourth Proportional to 393,067.76, 542,435.34 and 223,311.20

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Solution

The fourth proportional to 393,067.76, 542,435.34 and 223,311.20 is: 308,170.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,067.76 : 542,435.34 = 223,311.20 : x
  2. Step 2: Convert to fraction form
    393,067.76/542,435.34 = 223,311.20/x
  3. Step 3: Cross multiply
    393,067.76x = 542,435.34 × 223,311.20
  4. Step 4: Simplify right side
    393,067.76x = 121,131,886,697.81
  5. Step 5: Solve for x
    x = 121,131,886,697.81/393,067.76
  6. Step 6: Final answer
    x = 308,170.50

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1.5x scale

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.