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Finding the Fourth Proportional to 305.58, 457.21 and 203.11

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Solution

The fourth proportional to 305.58, 457.21 and 203.11 is: 303.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.58 : 457.21 = 203.11 : x
  2. Step 2: Convert to fraction form
    305.58/457.21 = 203.11/x
  3. Step 3: Cross multiply
    305.58x = 457.21 × 203.11
  4. Step 4: Simplify right side
    305.58x = 92,863.92
  5. Step 5: Solve for x
    x = 92,863.92/305.58
  6. Step 6: Final answer
    x = 303.89

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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.