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Finding the Fourth Proportional to 253,986.26, 380,979.36 and 85,492.44

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Solution

The fourth proportional to 253,986.26, 380,979.36 and 85,492.44 is: 128,238.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,986.26 : 380,979.36 = 85,492.44 : x
  2. Step 2: Convert to fraction form
    253,986.26/380,979.36 = 85,492.44/x
  3. Step 3: Cross multiply
    253,986.26x = 380,979.36 × 85,492.44
  4. Step 4: Simplify right side
    253,986.26x = 32,570,855,076.04
  5. Step 5: Solve for x
    x = 32,570,855,076.04/253,986.26
  6. Step 6: Final answer
    x = 128,238.65

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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.