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Finding the Fourth Proportional to 443,910.90, 665,963.55 and 219,378.90

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Solution

The fourth proportional to 443,910.90, 665,963.55 and 219,378.90 is: 329,116.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,910.90 : 665,963.55 = 219,378.90 : x
  2. Step 2: Convert to fraction form
    443,910.90/665,963.55 = 219,378.90/x
  3. Step 3: Cross multiply
    443,910.90x = 665,963.55 × 219,378.90
  4. Step 4: Simplify right side
    443,910.90x = 146,098,351,039.10
  5. Step 5: Solve for x
    x = 146,098,351,039.10/443,910.90
  6. Step 6: Final answer
    x = 329,116.39

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1.5x scale

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.