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Finding the Fourth Proportional to 638,735.40, 957,066.30 and 401,653.80

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Solution

The fourth proportional to 638,735.40, 957,066.30 and 401,653.80 is: 601,828.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,735.40 : 957,066.30 = 401,653.80 : x
  2. Step 2: Convert to fraction form
    638,735.40/957,066.30 = 401,653.80/x
  3. Step 3: Cross multiply
    638,735.40x = 957,066.30 × 401,653.80
  4. Step 4: Simplify right side
    638,735.40x = 384,409,316,246.94
  5. Step 5: Solve for x
    x = 384,409,316,246.94/638,735.40
  6. Step 6: Final answer
    x = 601,828.73

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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.