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Finding the Fourth Proportional to 693,834.32, 957,478.92 and 392,021.84

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Solution

The fourth proportional to 693,834.32, 957,478.92 and 392,021.84 is: 540,983.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,834.32 : 957,478.92 = 392,021.84 : x
  2. Step 2: Convert to fraction form
    693,834.32/957,478.92 = 392,021.84/x
  3. Step 3: Cross multiply
    693,834.32x = 957,478.92 × 392,021.84
  4. Step 4: Simplify right side
    693,834.32x = 375,352,647,979.61
  5. Step 5: Solve for x
    x = 375,352,647,979.61/693,834.32
  6. Step 6: Final answer
    x = 540,983.11

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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.