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Finding the Fourth Proportional to 271,319.40, 406,979.10 and 259,801.20

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Solution

The fourth proportional to 271,319.40, 406,979.10 and 259,801.20 is: 389,701.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,319.40 : 406,979.10 = 259,801.20 : x
  2. Step 2: Convert to fraction form
    271,319.40/406,979.10 = 259,801.20/x
  3. Step 3: Cross multiply
    271,319.40x = 406,979.10 × 259,801.20
  4. Step 4: Simplify right side
    271,319.40x = 105,733,658,554.92
  5. Step 5: Solve for x
    x = 105,733,658,554.92/271,319.40
  6. Step 6: Final answer
    x = 389,701.80

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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.