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Finding the Fourth Proportional to 452.54, 678.82 and 209

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Solution

The fourth proportional to 452.54, 678.82 and 209 is: 313.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.54 : 678.82 = 209 : x
  2. Step 2: Convert to fraction form
    452.54/678.82 = 209/x
  3. Step 3: Cross multiply
    452.54x = 678.82 × 209
  4. Step 4: Simplify right side
    452.54x = 141,873.38
  5. Step 5: Solve for x
    x = 141,873.38/452.54
  6. Step 6: Final answer
    x = 313.50

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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.