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Finding the Fourth Proportional to 443,015.20, 664,069.20 and 218,029.60

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Solution

The fourth proportional to 443,015.20, 664,069.20 and 218,029.60 is: 326,821.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,015.20 : 664,069.20 = 218,029.60 : x
  2. Step 2: Convert to fraction form
    443,015.20/664,069.20 = 218,029.60/x
  3. Step 3: Cross multiply
    443,015.20x = 664,069.20 × 218,029.60
  4. Step 4: Simplify right side
    443,015.20x = 144,786,742,048.32
  5. Step 5: Solve for x
    x = 144,786,742,048.32/443,015.20
  6. Step 6: Final answer
    x = 326,821.16

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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.