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Finding the Fourth Proportional to 483.07, 671.26 and 478.05

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Solution

The fourth proportional to 483.07, 671.26 and 478.05 is: 664.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.07 : 671.26 = 478.05 : x
  2. Step 2: Convert to fraction form
    483.07/671.26 = 478.05/x
  3. Step 3: Cross multiply
    483.07x = 671.26 × 478.05
  4. Step 4: Simplify right side
    483.07x = 320,894.65
  5. Step 5: Solve for x
    x = 320,894.65/483.07
  6. Step 6: Final answer
    x = 664.29

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.