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Finding the Fourth Proportional to 305.58, 457.46 and 208.18

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Solution

The fourth proportional to 305.58, 457.46 and 208.18 is: 311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.58 : 457.46 = 208.18 : x
  2. Step 2: Convert to fraction form
    305.58/457.46 = 208.18/x
  3. Step 3: Cross multiply
    305.58x = 457.46 × 208.18
  4. Step 4: Simplify right side
    305.58x = 95,231.84
  5. Step 5: Solve for x
    x = 95,231.84/305.58
  6. Step 6: Final answer
    x = 311.64

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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.