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Finding the Fourth Proportional to 270,358.80, 405,768.60 and 120,829.20

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Solution

The fourth proportional to 270,358.80, 405,768.60 and 120,829.20 is: 181,346.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,358.80 : 405,768.60 = 120,829.20 : x
  2. Step 2: Convert to fraction form
    270,358.80/405,768.60 = 120,829.20/x
  3. Step 3: Cross multiply
    270,358.80x = 405,768.60 × 120,829.20
  4. Step 4: Simplify right side
    270,358.80x = 49,028,695,323.12
  5. Step 5: Solve for x
    x = 49,028,695,323.12/270,358.80
  6. Step 6: Final answer
    x = 181,346.77

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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.