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Finding the Fourth Proportional to 665,123.20, 998,311.20 and 349,806.40

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Solution

The fourth proportional to 665,123.20, 998,311.20 and 349,806.40 is: 525,039.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,123.20 : 998,311.20 = 349,806.40 : x
  2. Step 2: Convert to fraction form
    665,123.20/998,311.20 = 349,806.40/x
  3. Step 3: Cross multiply
    665,123.20x = 998,311.20 × 349,806.40
  4. Step 4: Simplify right side
    665,123.20x = 349,215,646,951.68
  5. Step 5: Solve for x
    x = 349,215,646,951.68/665,123.20
  6. Step 6: Final answer
    x = 525,039.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.