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Finding the Fourth Proportional to 289,420.34, 399,396.57 and 168,581.30

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Solution

The fourth proportional to 289,420.34, 399,396.57 and 168,581.30 is: 232,640.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,420.34 : 399,396.57 = 168,581.30 : x
  2. Step 2: Convert to fraction form
    289,420.34/399,396.57 = 168,581.30/x
  3. Step 3: Cross multiply
    289,420.34x = 399,396.57 × 168,581.30
  4. Step 4: Simplify right side
    289,420.34x = 67,330,792,986.14
  5. Step 5: Solve for x
    x = 67,330,792,986.14/289,420.34
  6. Step 6: Final answer
    x = 232,640.16

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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.