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Finding the Fourth Proportional to 388,275.94, 582,679.89 and 135,556.45

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Solution

The fourth proportional to 388,275.94, 582,679.89 and 135,556.45 is: 203,427.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,275.94 : 582,679.89 = 135,556.45 : x
  2. Step 2: Convert to fraction form
    388,275.94/582,679.89 = 135,556.45/x
  3. Step 3: Cross multiply
    388,275.94x = 582,679.89 × 135,556.45
  4. Step 4: Simplify right side
    388,275.94x = 78,986,017,374.79
  5. Step 5: Solve for x
    x = 78,986,017,374.79/388,275.94
  6. Step 6: Final answer
    x = 203,427.54

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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.