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Finding the Fourth Proportional to 281,314.88, 388,214.88 and 153,998.48

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Solution

The fourth proportional to 281,314.88, 388,214.88 and 153,998.48 is: 212,518.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,314.88 : 388,214.88 = 153,998.48 : x
  2. Step 2: Convert to fraction form
    281,314.88/388,214.88 = 153,998.48/x
  3. Step 3: Cross multiply
    281,314.88x = 388,214.88 × 153,998.48
  4. Step 4: Simplify right side
    281,314.88x = 59,784,501,433.38
  5. Step 5: Solve for x
    x = 59,784,501,433.38/281,314.88
  6. Step 6: Final answer
    x = 212,518.09

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Half scale
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Double scale
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Similar ratio
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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.