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Finding the Fourth Proportional to 398,893.37, 550,595.66 and 245,979.55

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Solution

The fourth proportional to 398,893.37, 550,595.66 and 245,979.55 is: 339,527.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,893.37 : 550,595.66 = 245,979.55 : x
  2. Step 2: Convert to fraction form
    398,893.37/550,595.66 = 245,979.55/x
  3. Step 3: Cross multiply
    398,893.37x = 550,595.66 × 245,979.55
  4. Step 4: Simplify right side
    398,893.37x = 135,435,268,695.88
  5. Step 5: Solve for x
    x = 135,435,268,695.88/398,893.37
  6. Step 6: Final answer
    x = 339,527.50

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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.