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Finding the Fourth Proportional to 512,260.60, 768,390.90 and 263,428.60

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Solution

The fourth proportional to 512,260.60, 768,390.90 and 263,428.60 is: 395,142.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,260.60 : 768,390.90 = 263,428.60 : x
  2. Step 2: Convert to fraction form
    512,260.60/768,390.90 = 263,428.60/x
  3. Step 3: Cross multiply
    512,260.60x = 768,390.90 × 263,428.60
  4. Step 4: Simplify right side
    512,260.60x = 202,416,139,039.74
  5. Step 5: Solve for x
    x = 202,416,139,039.74/512,260.60
  6. Step 6: Final answer
    x = 395,142.90

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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.