Home / 388,815.36-533,065.80-381,729.48

Finding the Fourth Proportional to 388,815.36, 533,065.80 and 381,729.48

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Solution

The fourth proportional to 388,815.36, 533,065.80 and 381,729.48 is: 523,351.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,815.36 : 533,065.80 = 381,729.48 : x
  2. Step 2: Convert to fraction form
    388,815.36/533,065.80 = 381,729.48/x
  3. Step 3: Cross multiply
    388,815.36x = 533,065.80 × 381,729.48
  4. Step 4: Simplify right side
    388,815.36x = 203,486,930,639.78
  5. Step 5: Solve for x
    x = 203,486,930,639.78/388,815.36
  6. Step 6: Final answer
    x = 523,351.06

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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.