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Finding the Fourth Proportional to 312,639.84, 431,451 and 191,847.87

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Solution

The fourth proportional to 312,639.84, 431,451 and 191,847.87 is: 264,754.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,639.84 : 431,451 = 191,847.87 : x
  2. Step 2: Convert to fraction form
    312,639.84/431,451 = 191,847.87/x
  3. Step 3: Cross multiply
    312,639.84x = 431,451 × 191,847.87
  4. Step 4: Simplify right side
    312,639.84x = 82,772,955,359.37
  5. Step 5: Solve for x
    x = 82,772,955,359.37/312,639.84
  6. Step 6: Final answer
    x = 264,754.98

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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.