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Finding the Fourth Proportional to 305.97, 458.31 and 281.07

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Solution

The fourth proportional to 305.97, 458.31 and 281.07 is: 421.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.97 : 458.31 = 281.07 : x
  2. Step 2: Convert to fraction form
    305.97/458.31 = 281.07/x
  3. Step 3: Cross multiply
    305.97x = 458.31 × 281.07
  4. Step 4: Simplify right side
    305.97x = 128,817.19
  5. Step 5: Solve for x
    x = 128,817.19/305.97
  6. Step 6: Final answer
    x = 421.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.