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Finding the Fourth Proportional to 398,998.19, 550,617.53 and 255,758.54

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Solution

The fourth proportional to 398,998.19, 550,617.53 and 255,758.54 is: 352,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,998.19 : 550,617.53 = 255,758.54 : x
  2. Step 2: Convert to fraction form
    398,998.19/550,617.53 = 255,758.54/x
  3. Step 3: Cross multiply
    398,998.19x = 550,617.53 × 255,758.54
  4. Step 4: Simplify right side
    398,998.19x = 140,825,131,539.33
  5. Step 5: Solve for x
    x = 140,825,131,539.33/398,998.19
  6. Step 6: Final answer
    x = 352,946.80

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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.