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Finding the Fourth Proportional to 533.20, 801.60 and 426.16

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Solution

The fourth proportional to 533.20, 801.60 and 426.16 is: 640.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.20 : 801.60 = 426.16 : x
  2. Step 2: Convert to fraction form
    533.20/801.60 = 426.16/x
  3. Step 3: Cross multiply
    533.20x = 801.60 × 426.16
  4. Step 4: Simplify right side
    533.20x = 341,609.86
  5. Step 5: Solve for x
    x = 341,609.86/533.20
  6. Step 6: Final answer
    x = 640.68

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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.