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Finding the Fourth Proportional to 398,779.93, 550,005.19 and 255,553.33

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Solution

The fourth proportional to 398,779.93, 550,005.19 and 255,553.33 is: 352,464.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,779.93 : 550,005.19 = 255,553.33 : x
  2. Step 2: Convert to fraction form
    398,779.93/550,005.19 = 255,553.33/x
  3. Step 3: Cross multiply
    398,779.93x = 550,005.19 × 255,553.33
  4. Step 4: Simplify right side
    398,779.93x = 140,555,656,544.02
  5. Step 5: Solve for x
    x = 140,555,656,544.02/398,779.93
  6. Step 6: Final answer
    x = 352,464.22

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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.