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Finding the Fourth Proportional to 261,085.80, 391,191.30 and 223,469.40

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Solution

The fourth proportional to 261,085.80, 391,191.30 and 223,469.40 is: 334,829.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,085.80 : 391,191.30 = 223,469.40 : x
  2. Step 2: Convert to fraction form
    261,085.80/391,191.30 = 223,469.40/x
  3. Step 3: Cross multiply
    261,085.80x = 391,191.30 × 223,469.40
  4. Step 4: Simplify right side
    261,085.80x = 87,419,285,096.22
  5. Step 5: Solve for x
    x = 87,419,285,096.22/261,085.80
  6. Step 6: Final answer
    x = 334,829.72

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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.