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Finding the Fourth Proportional to 533.20, 735.60 and 393.65

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Solution

The fourth proportional to 533.20, 735.60 and 393.65 is: 543.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.20 : 735.60 = 393.65 : x
  2. Step 2: Convert to fraction form
    533.20/735.60 = 393.65/x
  3. Step 3: Cross multiply
    533.20x = 735.60 × 393.65
  4. Step 4: Simplify right side
    533.20x = 289,563.29
  5. Step 5: Solve for x
    x = 289,563.29/533.20
  6. Step 6: Final answer
    x = 543.07

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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.