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Finding the Fourth Proportional to 612,780.77, 919,169.78 and 291,958.80

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Solution

The fourth proportional to 612,780.77, 919,169.78 and 291,958.80 is: 437,937.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,780.77 : 919,169.78 = 291,958.80 : x
  2. Step 2: Convert to fraction form
    612,780.77/919,169.78 = 291,958.80/x
  3. Step 3: Cross multiply
    612,780.77x = 919,169.78 × 291,958.80
  4. Step 4: Simplify right side
    612,780.77x = 268,359,705,965.06
  5. Step 5: Solve for x
    x = 268,359,705,965.06/612,780.77
  6. Step 6: Final answer
    x = 437,937.54

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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.