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Finding the Fourth Proportional to 285,446.17, 393,898.79 and 156,358.84

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Solution

The fourth proportional to 285,446.17, 393,898.79 and 156,358.84 is: 215,765.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,446.17 : 393,898.79 = 156,358.84 : x
  2. Step 2: Convert to fraction form
    285,446.17/393,898.79 = 156,358.84/x
  3. Step 3: Cross multiply
    285,446.17x = 393,898.79 × 156,358.84
  4. Step 4: Simplify right side
    285,446.17x = 61,589,557,100.01
  5. Step 5: Solve for x
    x = 61,589,557,100.01/285,446.17
  6. Step 6: Final answer
    x = 215,765.93

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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.