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Finding the Fourth Proportional to 320.09, 441.70 and 180.21

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Solution

The fourth proportional to 320.09, 441.70 and 180.21 is: 248.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.09 : 441.70 = 180.21 : x
  2. Step 2: Convert to fraction form
    320.09/441.70 = 180.21/x
  3. Step 3: Cross multiply
    320.09x = 441.70 × 180.21
  4. Step 4: Simplify right side
    320.09x = 79,598.76
  5. Step 5: Solve for x
    x = 79,598.76/320.09
  6. Step 6: Final answer
    x = 248.68

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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.