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Finding the Fourth Proportional to 388,940.50, 583,410.75 and 126,284.50

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Solution

The fourth proportional to 388,940.50, 583,410.75 and 126,284.50 is: 189,426.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,940.50 : 583,410.75 = 126,284.50 : x
  2. Step 2: Convert to fraction form
    388,940.50/583,410.75 = 126,284.50/x
  3. Step 3: Cross multiply
    388,940.50x = 583,410.75 × 126,284.50
  4. Step 4: Simplify right side
    388,940.50x = 73,675,734,858.38
  5. Step 5: Solve for x
    x = 73,675,734,858.38/388,940.50
  6. Step 6: Final answer
    x = 189,426.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.