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Finding the Fourth Proportional to 693,790.80, 957,470.67 and 391,984.80

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Solution

The fourth proportional to 693,790.80, 957,470.67 and 391,984.80 is: 540,961.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,790.80 : 957,470.67 = 391,984.80 : x
  2. Step 2: Convert to fraction form
    693,790.80/957,470.67 = 391,984.80/x
  3. Step 3: Cross multiply
    693,790.80x = 957,470.67 × 391,984.80
  4. Step 4: Simplify right side
    693,790.80x = 375,313,949,085.82
  5. Step 5: Solve for x
    x = 375,313,949,085.82/693,790.80
  6. Step 6: Final answer
    x = 540,961.27

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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.