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Finding the Fourth Proportional to 301.90, 416.80 and 203.76

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Solution

The fourth proportional to 301.90, 416.80 and 203.76 is: 281.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.90 : 416.80 = 203.76 : x
  2. Step 2: Convert to fraction form
    301.90/416.80 = 203.76/x
  3. Step 3: Cross multiply
    301.90x = 416.80 × 203.76
  4. Step 4: Simplify right side
    301.90x = 84,927.17
  5. Step 5: Solve for x
    x = 84,927.17/301.90
  6. Step 6: Final answer
    x = 281.31

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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.