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Finding the Fourth Proportional to 443,079.20, 664,705.20 and 190,359.20

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Solution

The fourth proportional to 443,079.20, 664,705.20 and 190,359.20 is: 285,575.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,079.20 : 664,705.20 = 190,359.20 : x
  2. Step 2: Convert to fraction form
    443,079.20/664,705.20 = 190,359.20/x
  3. Step 3: Cross multiply
    443,079.20x = 664,705.20 × 190,359.20
  4. Step 4: Simplify right side
    443,079.20x = 126,532,750,107.84
  5. Step 5: Solve for x
    x = 126,532,750,107.84/443,079.20
  6. Step 6: Final answer
    x = 285,575.92

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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.