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Finding the Fourth Proportional to 363,912.80, 545,869.20 and 127,279.40

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Solution

The fourth proportional to 363,912.80, 545,869.20 and 127,279.40 is: 190,919.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,912.80 : 545,869.20 = 127,279.40 : x
  2. Step 2: Convert to fraction form
    363,912.80/545,869.20 = 127,279.40/x
  3. Step 3: Cross multiply
    363,912.80x = 545,869.20 × 127,279.40
  4. Step 4: Simplify right side
    363,912.80x = 69,477,904,254.48
  5. Step 5: Solve for x
    x = 69,477,904,254.48/363,912.80
  6. Step 6: Final answer
    x = 190,919.10

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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.