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Finding the Fourth Proportional to 443,195.40, 665,000.72 and 218,433.31

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Solution

The fourth proportional to 443,195.40, 665,000.72 and 218,433.31 is: 327,752.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,195.40 : 665,000.72 = 218,433.31 : x
  2. Step 2: Convert to fraction form
    443,195.40/665,000.72 = 218,433.31/x
  3. Step 3: Cross multiply
    443,195.40x = 665,000.72 × 218,433.31
  4. Step 4: Simplify right side
    443,195.40x = 145,258,310,227.07
  5. Step 5: Solve for x
    x = 145,258,310,227.07/443,195.40
  6. Step 6: Final answer
    x = 327,752.29

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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.