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Finding the Fourth Proportional to 271,307.40, 406,961.10 and 259,789.20

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Solution

The fourth proportional to 271,307.40, 406,961.10 and 259,789.20 is: 389,683.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,307.40 : 406,961.10 = 259,789.20 : x
  2. Step 2: Convert to fraction form
    271,307.40/406,961.10 = 259,789.20/x
  3. Step 3: Cross multiply
    271,307.40x = 406,961.10 × 259,789.20
  4. Step 4: Simplify right side
    271,307.40x = 105,724,098,600.12
  5. Step 5: Solve for x
    x = 105,724,098,600.12/271,307.40
  6. Step 6: Final answer
    x = 389,683.80

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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.