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Finding the Fourth Proportional to 693,803.88, 957,497.76 and 387,939.78

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Solution

The fourth proportional to 693,803.88, 957,497.76 and 387,939.78 is: 535,383.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,803.88 : 957,497.76 = 387,939.78 : x
  2. Step 2: Convert to fraction form
    693,803.88/957,497.76 = 387,939.78/x
  3. Step 3: Cross multiply
    693,803.88x = 957,497.76 × 387,939.78
  4. Step 4: Simplify right side
    693,803.88x = 371,451,470,364.89
  5. Step 5: Solve for x
    x = 371,451,470,364.89/693,803.88
  6. Step 6: Final answer
    x = 535,383.96

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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.