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Finding the Fourth Proportional to 533.48, 734.46 and 421.25

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Solution

The fourth proportional to 533.48, 734.46 and 421.25 is: 579.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.48 : 734.46 = 421.25 : x
  2. Step 2: Convert to fraction form
    533.48/734.46 = 421.25/x
  3. Step 3: Cross multiply
    533.48x = 734.46 × 421.25
  4. Step 4: Simplify right side
    533.48x = 309,391.28
  5. Step 5: Solve for x
    x = 309,391.28/533.48
  6. Step 6: Final answer
    x = 579.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.