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Finding the Fourth Proportional to 443,348.20, 665,108.70 and 190,628.20

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Solution

The fourth proportional to 443,348.20, 665,108.70 and 190,628.20 is: 285,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,348.20 : 665,108.70 = 190,628.20 : x
  2. Step 2: Convert to fraction form
    443,348.20/665,108.70 = 190,628.20/x
  3. Step 3: Cross multiply
    443,348.20x = 665,108.70 × 190,628.20
  4. Step 4: Simplify right side
    443,348.20x = 126,788,474,285.34
  5. Step 5: Solve for x
    x = 126,788,474,285.34/443,348.20
  6. Step 6: Final answer
    x = 285,979.45

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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.