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Finding the Fourth Proportional to 388,825.36, 533,079.50 and 381,739.48

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Solution

The fourth proportional to 388,825.36, 533,079.50 and 381,739.48 is: 523,364.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,825.36 : 533,079.50 = 381,739.48 : x
  2. Step 2: Convert to fraction form
    388,825.36/533,079.50 = 381,739.48/x
  3. Step 3: Cross multiply
    388,825.36x = 533,079.50 × 381,739.48
  4. Step 4: Simplify right side
    388,825.36x = 203,497,491,128.66
  5. Step 5: Solve for x
    x = 203,497,491,128.66/388,825.36
  6. Step 6: Final answer
    x = 523,364.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.