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Finding the Fourth Proportional to 666,863.38, 920,271.39 and 360,939.71

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Solution

The fourth proportional to 666,863.38, 920,271.39 and 360,939.71 is: 498,096.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,863.38 : 920,271.39 = 360,939.71 : x
  2. Step 2: Convert to fraction form
    666,863.38/920,271.39 = 360,939.71/x
  3. Step 3: Cross multiply
    666,863.38x = 920,271.39 × 360,939.71
  4. Step 4: Simplify right side
    666,863.38x = 332,162,484,026.54
  5. Step 5: Solve for x
    x = 332,162,484,026.54/666,863.38
  6. Step 6: Final answer
    x = 498,096.76

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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.