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Finding the Fourth Proportional to 388,940.36, 583,410.54 and 122,727.84

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Solution

The fourth proportional to 388,940.36, 583,410.54 and 122,727.84 is: 184,091.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,940.36 : 583,410.54 = 122,727.84 : x
  2. Step 2: Convert to fraction form
    388,940.36/583,410.54 = 122,727.84/x
  3. Step 3: Cross multiply
    388,940.36x = 583,410.54 × 122,727.84
  4. Step 4: Simplify right side
    388,940.36x = 71,600,715,407.43
  5. Step 5: Solve for x
    x = 71,600,715,407.43/388,940.36
  6. Step 6: Final answer
    x = 184,091.76

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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.