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Finding the Fourth Proportional to 408,665.56, 613,051.90 and 135,020.86

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Solution

The fourth proportional to 408,665.56, 613,051.90 and 135,020.86 is: 202,548.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,665.56 : 613,051.90 = 135,020.86 : x
  2. Step 2: Convert to fraction form
    408,665.56/613,051.90 = 135,020.86/x
  3. Step 3: Cross multiply
    408,665.56x = 613,051.90 × 135,020.86
  4. Step 4: Simplify right side
    408,665.56x = 82,774,794,762.63
  5. Step 5: Solve for x
    x = 82,774,794,762.63/408,665.56
  6. Step 6: Final answer
    x = 202,548.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.