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Finding the Fourth Proportional to 330,021, 455,430.20 and 179,118

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Solution

The fourth proportional to 330,021, 455,430.20 and 179,118 is: 247,183.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,021 : 455,430.20 = 179,118 : x
  2. Step 2: Convert to fraction form
    330,021/455,430.20 = 179,118/x
  3. Step 3: Cross multiply
    330,021x = 455,430.20 × 179,118
  4. Step 4: Simplify right side
    330,021x = 81,575,745,668.01
  5. Step 5: Solve for x
    x = 81,575,745,668.01/330,021
  6. Step 6: Final answer
    x = 247,183.50

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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.