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Finding the Fourth Proportional to 393,653.40, 590,537.70 and 127,368.60

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Solution

The fourth proportional to 393,653.40, 590,537.70 and 127,368.60 is: 191,071.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,653.40 : 590,537.70 = 127,368.60 : x
  2. Step 2: Convert to fraction form
    393,653.40/590,537.70 = 127,368.60/x
  3. Step 3: Cross multiply
    393,653.40x = 590,537.70 × 127,368.60
  4. Step 4: Simplify right side
    393,653.40x = 75,215,960,096.22
  5. Step 5: Solve for x
    x = 75,215,960,096.22/393,653.40
  6. Step 6: Final answer
    x = 191,071.54

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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.