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Finding the Fourth Proportional to 260,744.40, 391,159.80 and 111,056.40

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Solution

The fourth proportional to 260,744.40, 391,159.80 and 111,056.40 is: 166,603.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,744.40 : 391,159.80 = 111,056.40 : x
  2. Step 2: Convert to fraction form
    260,744.40/391,159.80 = 111,056.40/x
  3. Step 3: Cross multiply
    260,744.40x = 391,159.80 × 111,056.40
  4. Step 4: Simplify right side
    260,744.40x = 43,440,799,212.72
  5. Step 5: Solve for x
    x = 43,440,799,212.72/260,744.40
  6. Step 6: Final answer
    x = 166,603.00

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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.