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Finding the Fourth Proportional to 533.89, 736.64 and 312.83

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Solution

The fourth proportional to 533.89, 736.64 and 312.83 is: 431.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.89 : 736.64 = 312.83 : x
  2. Step 2: Convert to fraction form
    533.89/736.64 = 312.83/x
  3. Step 3: Cross multiply
    533.89x = 736.64 × 312.83
  4. Step 4: Simplify right side
    533.89x = 230,439.41
  5. Step 5: Solve for x
    x = 230,439.41/533.89
  6. Step 6: Final answer
    x = 431.63

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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.