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Finding the Fourth Proportional to 393,144.36, 542,536.46 and 223,378.48

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Solution

The fourth proportional to 393,144.36, 542,536.46 and 223,378.48 is: 308,260.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,144.36 : 542,536.46 = 223,378.48 : x
  2. Step 2: Convert to fraction form
    393,144.36/542,536.46 = 223,378.48/x
  3. Step 3: Cross multiply
    393,144.36x = 542,536.46 × 223,378.48
  4. Step 4: Simplify right side
    393,144.36x = 121,190,972,960.72
  5. Step 5: Solve for x
    x = 121,190,972,960.72/393,144.36
  6. Step 6: Final answer
    x = 308,260.74

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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.