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Finding the Fourth Proportional to 505,181.88, 697,101.36 and 278,812.80

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Solution

The fourth proportional to 505,181.88, 697,101.36 and 278,812.80 is: 384,734.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,181.88 : 697,101.36 = 278,812.80 : x
  2. Step 2: Convert to fraction form
    505,181.88/697,101.36 = 278,812.80/x
  3. Step 3: Cross multiply
    505,181.88x = 697,101.36 × 278,812.80
  4. Step 4: Simplify right side
    505,181.88x = 194,360,782,065.41
  5. Step 5: Solve for x
    x = 194,360,782,065.41/505,181.88
  6. Step 6: Final answer
    x = 384,734.27

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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.