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Finding the Fourth Proportional to 443,859.18, 665,329.50 and 218,918.94

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Solution

The fourth proportional to 443,859.18, 665,329.50 and 218,918.94 is: 328,151.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,859.18 : 665,329.50 = 218,918.94 : x
  2. Step 2: Convert to fraction form
    443,859.18/665,329.50 = 218,918.94/x
  3. Step 3: Cross multiply
    443,859.18x = 665,329.50 × 218,918.94
  4. Step 4: Simplify right side
    443,859.18x = 145,653,228,890.73
  5. Step 5: Solve for x
    x = 145,653,228,890.73/443,859.18
  6. Step 6: Final answer
    x = 328,151.89

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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.