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Finding the Fourth Proportional to 309,020.67, 426,491.73 and 223,257.21

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Solution

The fourth proportional to 309,020.67, 426,491.73 and 223,257.21 is: 308,126.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,020.67 : 426,491.73 = 223,257.21 : x
  2. Step 2: Convert to fraction form
    309,020.67/426,491.73 = 223,257.21/x
  3. Step 3: Cross multiply
    309,020.67x = 426,491.73 × 223,257.21
  4. Step 4: Simplify right side
    309,020.67x = 95,217,353,727.87
  5. Step 5: Solve for x
    x = 95,217,353,727.87/309,020.67
  6. Step 6: Final answer
    x = 308,126.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.