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Finding the Fourth Proportional to 494,556.30, 739,866.15 and 428,727.60

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Solution

The fourth proportional to 494,556.30, 739,866.15 and 428,727.60 is: 641,385.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,556.30 : 739,866.15 = 428,727.60 : x
  2. Step 2: Convert to fraction form
    494,556.30/739,866.15 = 428,727.60/x
  3. Step 3: Cross multiply
    494,556.30x = 739,866.15 × 428,727.60
  4. Step 4: Simplify right side
    494,556.30x = 317,201,038,810.74
  5. Step 5: Solve for x
    x = 317,201,038,810.74/494,556.30
  6. Step 6: Final answer
    x = 641,385.09

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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.