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Finding the Fourth Proportional to 320.50, 442.28 and 180.61

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Solution

The fourth proportional to 320.50, 442.28 and 180.61 is: 249.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.50 : 442.28 = 180.61 : x
  2. Step 2: Convert to fraction form
    320.50/442.28 = 180.61/x
  3. Step 3: Cross multiply
    320.50x = 442.28 × 180.61
  4. Step 4: Simplify right side
    320.50x = 79,879.29
  5. Step 5: Solve for x
    x = 79,879.29/320.50
  6. Step 6: Final answer
    x = 249.24

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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.