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Finding the Fourth Proportional to 285,411.67, 393,866.34 and 156,351.40

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Solution

The fourth proportional to 285,411.67, 393,866.34 and 156,351.40 is: 215,763.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,411.67 : 393,866.34 = 156,351.40 : x
  2. Step 2: Convert to fraction form
    285,411.67/393,866.34 = 156,351.40/x
  3. Step 3: Cross multiply
    285,411.67x = 393,866.34 × 156,351.40
  4. Step 4: Simplify right side
    285,411.67x = 61,581,553,671.88
  5. Step 5: Solve for x
    x = 61,581,553,671.88/285,411.67
  6. Step 6: Final answer
    x = 215,763.97

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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.