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Finding the Fourth Proportional to 291,470.70, 404,063.90 and 275,505.66

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Solution

The fourth proportional to 291,470.70, 404,063.90 and 275,505.66 is: 381,931.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,470.70 : 404,063.90 = 275,505.66 : x
  2. Step 2: Convert to fraction form
    291,470.70/404,063.90 = 275,505.66/x
  3. Step 3: Cross multiply
    291,470.70x = 404,063.90 × 275,505.66
  4. Step 4: Simplify right side
    291,470.70x = 111,321,890,074.15
  5. Step 5: Solve for x
    x = 111,321,890,074.15/291,470.70
  6. Step 6: Final answer
    x = 381,931.67

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.