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Finding the Fourth Proportional to 271,390.40, 407,085.60 and 131,422.40

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Solution

The fourth proportional to 271,390.40, 407,085.60 and 131,422.40 is: 197,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,390.40 : 407,085.60 = 131,422.40 : x
  2. Step 2: Convert to fraction form
    271,390.40/407,085.60 = 131,422.40/x
  3. Step 3: Cross multiply
    271,390.40x = 407,085.60 × 131,422.40
  4. Step 4: Simplify right side
    271,390.40x = 53,500,166,557.44
  5. Step 5: Solve for x
    x = 53,500,166,557.44/271,390.40
  6. Step 6: Final answer
    x = 197,133.60

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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.