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Finding the Fourth Proportional to 505,519.86, 697,616.91 and 279,164.82

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Solution

The fourth proportional to 505,519.86, 697,616.91 and 279,164.82 is: 385,247.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,519.86 : 697,616.91 = 279,164.82 : x
  2. Step 2: Convert to fraction form
    505,519.86/697,616.91 = 279,164.82/x
  3. Step 3: Cross multiply
    505,519.86x = 697,616.91 × 279,164.82
  4. Step 4: Simplify right side
    505,519.86x = 194,750,099,109.11
  5. Step 5: Solve for x
    x = 194,750,099,109.11/505,519.86
  6. Step 6: Final answer
    x = 385,247.18

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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.