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Finding the Fourth Proportional to 670,449.83, 925,217.55 and 394,967.61

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Solution

The fourth proportional to 670,449.83, 925,217.55 and 394,967.61 is: 545,053.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,449.83 : 925,217.55 = 394,967.61 : x
  2. Step 2: Convert to fraction form
    670,449.83/925,217.55 = 394,967.61/x
  3. Step 3: Cross multiply
    670,449.83x = 925,217.55 × 394,967.61
  4. Step 4: Simplify right side
    670,449.83x = 365,430,964,453.56
  5. Step 5: Solve for x
    x = 365,430,964,453.56/670,449.83
  6. Step 6: Final answer
    x = 545,053.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.