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Finding the Fourth Proportional to 355,287.20, 490,281.70 and 194,147.80

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Solution

The fourth proportional to 355,287.20, 490,281.70 and 194,147.80 is: 267,915.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,287.20 : 490,281.70 = 194,147.80 : x
  2. Step 2: Convert to fraction form
    355,287.20/490,281.70 = 194,147.80/x
  3. Step 3: Cross multiply
    355,287.20x = 490,281.70 × 194,147.80
  4. Step 4: Simplify right side
    355,287.20x = 95,187,113,435.26
  5. Step 5: Solve for x
    x = 95,187,113,435.26/355,287.20
  6. Step 6: Final answer
    x = 267,915.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.