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Finding the Fourth Proportional to 270,647.20, 405,970.80 and 122,903.20

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Solution

The fourth proportional to 270,647.20, 405,970.80 and 122,903.20 is: 184,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,647.20 : 405,970.80 = 122,903.20 : x
  2. Step 2: Convert to fraction form
    270,647.20/405,970.80 = 122,903.20/x
  3. Step 3: Cross multiply
    270,647.20x = 405,970.80 × 122,903.20
  4. Step 4: Simplify right side
    270,647.20x = 49,895,110,426.56
  5. Step 5: Solve for x
    x = 49,895,110,426.56/270,647.20
  6. Step 6: Final answer
    x = 184,354.80

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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.