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Finding the Fourth Proportional to 388,074.33, 582,208.37 and 135,358.44

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Solution

The fourth proportional to 388,074.33, 582,208.37 and 135,358.44 is: 203,071.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,074.33 : 582,208.37 = 135,358.44 : x
  2. Step 2: Convert to fraction form
    388,074.33/582,208.37 = 135,358.44/x
  3. Step 3: Cross multiply
    388,074.33x = 582,208.37 × 135,358.44
  4. Step 4: Simplify right side
    388,074.33x = 78,806,816,041.35
  5. Step 5: Solve for x
    x = 78,806,816,041.35/388,074.33
  6. Step 6: Final answer
    x = 203,071.45

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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.