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Finding the Fourth Proportional to 622,995.56, 859,801.20 and 381,440.60

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Solution

The fourth proportional to 622,995.56, 859,801.20 and 381,440.60 is: 526,429.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,995.56 : 859,801.20 = 381,440.60 : x
  2. Step 2: Convert to fraction form
    622,995.56/859,801.20 = 381,440.60/x
  3. Step 3: Cross multiply
    622,995.56x = 859,801.20 × 381,440.60
  4. Step 4: Simplify right side
    622,995.56x = 327,963,085,608.72
  5. Step 5: Solve for x
    x = 327,963,085,608.72/622,995.56
  6. Step 6: Final answer
    x = 526,429.25

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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.