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Finding the Fourth Proportional to 578,455.60, 867,100.20 and 263,138.80

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Solution

The fourth proportional to 578,455.60, 867,100.20 and 263,138.80 is: 394,442.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,455.60 : 867,100.20 = 263,138.80 : x
  2. Step 2: Convert to fraction form
    578,455.60/867,100.20 = 263,138.80/x
  3. Step 3: Cross multiply
    578,455.60x = 867,100.20 × 263,138.80
  4. Step 4: Simplify right side
    578,455.60x = 228,167,706,107.76
  5. Step 5: Solve for x
    x = 228,167,706,107.76/578,455.60
  6. Step 6: Final answer
    x = 394,442.90

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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.