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Finding the Fourth Proportional to 612,912.60, 919,368.90 and 192,187.80

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Solution

The fourth proportional to 612,912.60, 919,368.90 and 192,187.80 is: 288,281.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,912.60 : 919,368.90 = 192,187.80 : x
  2. Step 2: Convert to fraction form
    612,912.60/919,368.90 = 192,187.80/x
  3. Step 3: Cross multiply
    612,912.60x = 919,368.90 × 192,187.80
  4. Step 4: Simplify right side
    612,912.60x = 176,691,486,279.42
  5. Step 5: Solve for x
    x = 176,691,486,279.42/612,912.60
  6. Step 6: Final answer
    x = 288,281.70

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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.