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Finding the Fourth Proportional to 287,628.01, 396,940.16 and 160,304.51

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Solution

The fourth proportional to 287,628.01, 396,940.16 and 160,304.51 is: 221,227.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,628.01 : 396,940.16 = 160,304.51 : x
  2. Step 2: Convert to fraction form
    287,628.01/396,940.16 = 160,304.51/x
  3. Step 3: Cross multiply
    287,628.01x = 396,940.16 × 160,304.51
  4. Step 4: Simplify right side
    287,628.01x = 63,631,297,848.12
  5. Step 5: Solve for x
    x = 63,631,297,848.12/287,628.01
  6. Step 6: Final answer
    x = 221,227.76

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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.