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Finding the Fourth Proportional to 421.04, 581.09 and 322.62

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Solution

The fourth proportional to 421.04, 581.09 and 322.62 is: 445.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.04 : 581.09 = 322.62 : x
  2. Step 2: Convert to fraction form
    421.04/581.09 = 322.62/x
  3. Step 3: Cross multiply
    421.04x = 581.09 × 322.62
  4. Step 4: Simplify right side
    421.04x = 187,469.64
  5. Step 5: Solve for x
    x = 187,469.64/421.04
  6. Step 6: Final answer
    x = 445.26

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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.