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Finding the Fourth Proportional to 270,608.40, 405,904.22 and 128,555.93

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Solution

The fourth proportional to 270,608.40, 405,904.22 and 128,555.93 is: 192,829.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,608.40 : 405,904.22 = 128,555.93 : x
  2. Step 2: Convert to fraction form
    270,608.40/405,904.22 = 128,555.93/x
  3. Step 3: Cross multiply
    270,608.40x = 405,904.22 × 128,555.93
  4. Step 4: Simplify right side
    270,608.40x = 52,181,394,493.02
  5. Step 5: Solve for x
    x = 52,181,394,493.02/270,608.40
  6. Step 6: Final answer
    x = 192,829.91

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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.