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Finding the Fourth Proportional to 518,019.81, 777,112.75 and 218,544.50

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Solution

The fourth proportional to 518,019.81, 777,112.75 and 218,544.50 is: 327,851.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,019.81 : 777,112.75 = 218,544.50 : x
  2. Step 2: Convert to fraction form
    518,019.81/777,112.75 = 218,544.50/x
  3. Step 3: Cross multiply
    518,019.81x = 777,112.75 × 218,544.50
  4. Step 4: Simplify right side
    518,019.81x = 169,833,715,237.08
  5. Step 5: Solve for x
    x = 169,833,715,237.08/518,019.81
  6. Step 6: Final answer
    x = 327,851.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.