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Finding the Fourth Proportional to 388,274.94, 582,678.39 and 135,555.45

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Solution

The fourth proportional to 388,274.94, 582,678.39 and 135,555.45 is: 203,426.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,274.94 : 582,678.39 = 135,555.45 : x
  2. Step 2: Convert to fraction form
    388,274.94/582,678.39 = 135,555.45/x
  3. Step 3: Cross multiply
    388,274.94x = 582,678.39 × 135,555.45
  4. Step 4: Simplify right side
    388,274.94x = 78,985,229,685.01
  5. Step 5: Solve for x
    x = 78,985,229,685.01/388,274.94
  6. Step 6: Final answer
    x = 203,426.03

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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.