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Finding the Fourth Proportional to 317,778.88, 438,351.72 and 190,380.68

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Solution

The fourth proportional to 317,778.88, 438,351.72 and 190,380.68 is: 262,615.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,778.88 : 438,351.72 = 190,380.68 : x
  2. Step 2: Convert to fraction form
    317,778.88/438,351.72 = 190,380.68/x
  3. Step 3: Cross multiply
    317,778.88x = 438,351.72 × 190,380.68
  4. Step 4: Simplify right side
    317,778.88x = 83,453,698,532.77
  5. Step 5: Solve for x
    x = 83,453,698,532.77/317,778.88
  6. Step 6: Final answer
    x = 262,615.62

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1.5x scale

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.