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Finding the Fourth Proportional to 533.60, 736.40 and 300.80

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Solution

The fourth proportional to 533.60, 736.40 and 300.80 is: 415.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.60 : 736.40 = 300.80 : x
  2. Step 2: Convert to fraction form
    533.60/736.40 = 300.80/x
  3. Step 3: Cross multiply
    533.60x = 736.40 × 300.80
  4. Step 4: Simplify right side
    533.60x = 221,509.12
  5. Step 5: Solve for x
    x = 221,509.12/533.60
  6. Step 6: Final answer
    x = 415.12

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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.