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Finding the Fourth Proportional to 489.45, 671.82 and 452.51

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Solution

The fourth proportional to 489.45, 671.82 and 452.51 is: 621.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.45 : 671.82 = 452.51 : x
  2. Step 2: Convert to fraction form
    489.45/671.82 = 452.51/x
  3. Step 3: Cross multiply
    489.45x = 671.82 × 452.51
  4. Step 4: Simplify right side
    489.45x = 304,005.27
  5. Step 5: Solve for x
    x = 304,005.27/489.45
  6. Step 6: Final answer
    x = 621.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.