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Finding the Fourth Proportional to 490.89, 671.42 and 483.60

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Solution

The fourth proportional to 490.89, 671.42 and 483.60 is: 661.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.89 : 671.42 = 483.60 : x
  2. Step 2: Convert to fraction form
    490.89/671.42 = 483.60/x
  3. Step 3: Cross multiply
    490.89x = 671.42 × 483.60
  4. Step 4: Simplify right side
    490.89x = 324,702.44
  5. Step 5: Solve for x
    x = 324,702.44/490.89
  6. Step 6: Final answer
    x = 661.45

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1.5x scale

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.