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Finding the Fourth Proportional to 813,894.75, 1,123,174.76 and 456,198.75

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Solution

The fourth proportional to 813,894.75, 1,123,174.76 and 456,198.75 is: 629,554.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,894.75 : 1,123,174.76 = 456,198.75 : x
  2. Step 2: Convert to fraction form
    813,894.75/1,123,174.76 = 456,198.75/x
  3. Step 3: Cross multiply
    813,894.75x = 1,123,174.76 × 456,198.75
  4. Step 4: Simplify right side
    813,894.75x = 512,390,919,262.56
  5. Step 5: Solve for x
    x = 512,390,919,262.56/813,894.75
  6. Step 6: Final answer
    x = 629,554.28

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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.