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Finding the Fourth Proportional to 410,831.20, 616,246.80 and 186,104.80

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Solution

The fourth proportional to 410,831.20, 616,246.80 and 186,104.80 is: 279,157.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,831.20 : 616,246.80 = 186,104.80 : x
  2. Step 2: Convert to fraction form
    410,831.20/616,246.80 = 186,104.80/x
  3. Step 3: Cross multiply
    410,831.20x = 616,246.80 × 186,104.80
  4. Step 4: Simplify right side
    410,831.20x = 114,686,487,464.64
  5. Step 5: Solve for x
    x = 114,686,487,464.64/410,831.20
  6. Step 6: Final answer
    x = 279,157.20

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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.