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Finding the Fourth Proportional to 491.78, 674.26 and 483.01

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Solution

The fourth proportional to 491.78, 674.26 and 483.01 is: 662.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.78 : 674.26 = 483.01 : x
  2. Step 2: Convert to fraction form
    491.78/674.26 = 483.01/x
  3. Step 3: Cross multiply
    491.78x = 674.26 × 483.01
  4. Step 4: Simplify right side
    491.78x = 325,671.43
  5. Step 5: Solve for x
    x = 325,671.43/491.78
  6. Step 6: Final answer
    x = 662.23

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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.