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Finding the Fourth Proportional to 258,889.60, 388,334.40 and 92,617.60

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Solution

The fourth proportional to 258,889.60, 388,334.40 and 92,617.60 is: 138,926.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,889.60 : 388,334.40 = 92,617.60 : x
  2. Step 2: Convert to fraction form
    258,889.60/388,334.40 = 92,617.60/x
  3. Step 3: Cross multiply
    258,889.60x = 388,334.40 × 92,617.60
  4. Step 4: Simplify right side
    258,889.60x = 35,966,600,125.44
  5. Step 5: Solve for x
    x = 35,966,600,125.44/258,889.60
  6. Step 6: Final answer
    x = 138,926.40

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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.