Home / 812,933.60-1,219,400.40-512,439.80

Finding the Fourth Proportional to 812,933.60, 1,219,400.40 and 512,439.80

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Solution

The fourth proportional to 812,933.60, 1,219,400.40 and 512,439.80 is: 768,659.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,933.60 : 1,219,400.40 = 512,439.80 : x
  2. Step 2: Convert to fraction form
    812,933.60/1,219,400.40 = 512,439.80/x
  3. Step 3: Cross multiply
    812,933.60x = 1,219,400.40 × 512,439.80
  4. Step 4: Simplify right side
    812,933.60x = 624,869,297,095.92
  5. Step 5: Solve for x
    x = 624,869,297,095.92/812,933.60
  6. Step 6: Final answer
    x = 768,659.70

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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.