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Finding the Fourth Proportional to 505,680.64, 697,860.50 and 290,820.88

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Solution

The fourth proportional to 505,680.64, 697,860.50 and 290,820.88 is: 401,345.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,680.64 : 697,860.50 = 290,820.88 : x
  2. Step 2: Convert to fraction form
    505,680.64/697,860.50 = 290,820.88/x
  3. Step 3: Cross multiply
    505,680.64x = 697,860.50 × 290,820.88
  4. Step 4: Simplify right side
    505,680.64x = 202,952,404,727.24
  5. Step 5: Solve for x
    x = 202,952,404,727.24/505,680.64
  6. Step 6: Final answer
    x = 401,345.02

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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.