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Finding the Fourth Proportional to 271,311.40, 406,679.10 and 130,978.60

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Solution

The fourth proportional to 271,311.40, 406,679.10 and 130,978.60 is: 196,328.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,311.40 : 406,679.10 = 130,978.60 : x
  2. Step 2: Convert to fraction form
    271,311.40/406,679.10 = 130,978.60/x
  3. Step 3: Cross multiply
    271,311.40x = 406,679.10 × 130,978.60
  4. Step 4: Simplify right side
    271,311.40x = 53,266,259,167.26
  5. Step 5: Solve for x
    x = 53,266,259,167.26/271,311.40
  6. Step 6: Final answer
    x = 196,328.86

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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.