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Finding the Fourth Proportional to 711,611.80, 982,023.05 and 389,321.12

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Solution

The fourth proportional to 711,611.80, 982,023.05 and 389,321.12 is: 537,262.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,611.80 : 982,023.05 = 389,321.12 : x
  2. Step 2: Convert to fraction form
    711,611.80/982,023.05 = 389,321.12/x
  3. Step 3: Cross multiply
    711,611.80x = 982,023.05 × 389,321.12
  4. Step 4: Simplify right side
    711,611.80x = 382,322,317,120.18
  5. Step 5: Solve for x
    x = 382,322,317,120.18/711,611.80
  6. Step 6: Final answer
    x = 537,262.48

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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.