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Finding the Fourth Proportional to 360.80, 497.99 and 221.01

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Solution

The fourth proportional to 360.80, 497.99 and 221.01 is: 305.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.80 : 497.99 = 221.01 : x
  2. Step 2: Convert to fraction form
    360.80/497.99 = 221.01/x
  3. Step 3: Cross multiply
    360.80x = 497.99 × 221.01
  4. Step 4: Simplify right side
    360.80x = 110,059.66
  5. Step 5: Solve for x
    x = 110,059.66/360.80
  6. Step 6: Final answer
    x = 305.05

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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.