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Finding the Fourth Proportional to 388,279.44, 582,685.16 and 135,559.96

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Solution

The fourth proportional to 388,279.44, 582,685.16 and 135,559.96 is: 203,432.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,279.44 : 582,685.16 = 135,559.96 : x
  2. Step 2: Convert to fraction form
    388,279.44/582,685.16 = 135,559.96/x
  3. Step 3: Cross multiply
    388,279.44x = 582,685.16 × 135,559.96
  4. Step 4: Simplify right side
    388,279.44x = 78,988,774,847.68
  5. Step 5: Solve for x
    x = 78,988,774,847.68/388,279.44
  6. Step 6: Final answer
    x = 203,432.80

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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.