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Finding the Fourth Proportional to 288,956.70, 398,585.89 and 190,840.53

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Solution

The fourth proportional to 288,956.70, 398,585.89 and 190,840.53 is: 263,244.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,956.70 : 398,585.89 = 190,840.53 : x
  2. Step 2: Convert to fraction form
    288,956.70/398,585.89 = 190,840.53/x
  3. Step 3: Cross multiply
    288,956.70x = 398,585.89 × 190,840.53
  4. Step 4: Simplify right side
    288,956.70x = 76,066,342,573.61
  5. Step 5: Solve for x
    x = 76,066,342,573.61/288,956.70
  6. Step 6: Final answer
    x = 263,244.78

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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.