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Finding the Fourth Proportional to 505,570.11, 697,682.48 and 279,210.75

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Solution

The fourth proportional to 505,570.11, 697,682.48 and 279,210.75 is: 385,308.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,570.11 : 697,682.48 = 279,210.75 : x
  2. Step 2: Convert to fraction form
    505,570.11/697,682.48 = 279,210.75/x
  3. Step 3: Cross multiply
    505,570.11x = 697,682.48 × 279,210.75
  4. Step 4: Simplify right side
    505,570.11x = 194,800,447,106.61
  5. Step 5: Solve for x
    x = 194,800,447,106.61/505,570.11
  6. Step 6: Final answer
    x = 385,308.47

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Double scale
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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.