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Finding the Fourth Proportional to 443,046.40, 664,666.80 and 218,514.40

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Solution

The fourth proportional to 443,046.40, 664,666.80 and 218,514.40 is: 327,819.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,046.40 : 664,666.80 = 218,514.40 : x
  2. Step 2: Convert to fraction form
    443,046.40/664,666.80 = 218,514.40/x
  3. Step 3: Cross multiply
    443,046.40x = 664,666.80 × 218,514.40
  4. Step 4: Simplify right side
    443,046.40x = 145,239,267,001.92
  5. Step 5: Solve for x
    x = 145,239,267,001.92/443,046.40
  6. Step 6: Final answer
    x = 327,819.54

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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.