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Finding the Fourth Proportional to 533.30, 735.90 and 408.70

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Solution

The fourth proportional to 533.30, 735.90 and 408.70 is: 563.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.30 : 735.90 = 408.70 : x
  2. Step 2: Convert to fraction form
    533.30/735.90 = 408.70/x
  3. Step 3: Cross multiply
    533.30x = 735.90 × 408.70
  4. Step 4: Simplify right side
    533.30x = 300,758.65
  5. Step 5: Solve for x
    x = 300,758.65/533.30
  6. Step 6: Final answer
    x = 563.96

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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.