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Finding the Fourth Proportional to 579.79, 867.42 and 448.79

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Solution

The fourth proportional to 579.79, 867.42 and 448.79 is: 671.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.79 : 867.42 = 448.79 : x
  2. Step 2: Convert to fraction form
    579.79/867.42 = 448.79/x
  3. Step 3: Cross multiply
    579.79x = 867.42 × 448.79
  4. Step 4: Simplify right side
    579.79x = 389,289.42
  5. Step 5: Solve for x
    x = 389,289.42/579.79
  6. Step 6: Final answer
    x = 671.43

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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.