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Finding the Fourth Proportional to 452.27, 678.20 and 208.86

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Solution

The fourth proportional to 452.27, 678.20 and 208.86 is: 313.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.27 : 678.20 = 208.86 : x
  2. Step 2: Convert to fraction form
    452.27/678.20 = 208.86/x
  3. Step 3: Cross multiply
    452.27x = 678.20 × 208.86
  4. Step 4: Simplify right side
    452.27x = 141,647.81
  5. Step 5: Solve for x
    x = 141,647.81/452.27
  6. Step 6: Final answer
    x = 313.20

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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.