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Finding the Fourth Proportional to 505,917.78, 698,210.73 and 279,607.02

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Solution

The fourth proportional to 505,917.78, 698,210.73 and 279,607.02 is: 385,882.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,917.78 : 698,210.73 = 279,607.02 : x
  2. Step 2: Convert to fraction form
    505,917.78/698,210.73 = 279,607.02/x
  3. Step 3: Cross multiply
    505,917.78x = 698,210.73 × 279,607.02
  4. Step 4: Simplify right side
    505,917.78x = 195,224,621,547.33
  5. Step 5: Solve for x
    x = 195,224,621,547.33/505,917.78
  6. Step 6: Final answer
    x = 385,882.11

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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.