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Finding the Fourth Proportional to 398,782.44, 550,008.58 and 255,555.81

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Solution

The fourth proportional to 398,782.44, 550,008.58 and 255,555.81 is: 352,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,782.44 : 550,008.58 = 255,555.81 : x
  2. Step 2: Convert to fraction form
    398,782.44/550,008.58 = 255,555.81/x
  3. Step 3: Cross multiply
    398,782.44x = 550,008.58 × 255,555.81
  4. Step 4: Simplify right side
    398,782.44x = 140,557,888,168.85
  5. Step 5: Solve for x
    x = 140,557,888,168.85/398,782.44
  6. Step 6: Final answer
    x = 352,467.60

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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.