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Finding the Fourth Proportional to 533.90, 736.75 and 312.84

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Solution

The fourth proportional to 533.90, 736.75 and 312.84 is: 431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.90 : 736.75 = 312.84 : x
  2. Step 2: Convert to fraction form
    533.90/736.75 = 312.84/x
  3. Step 3: Cross multiply
    533.90x = 736.75 × 312.84
  4. Step 4: Simplify right side
    533.90x = 230,484.87
  5. Step 5: Solve for x
    x = 230,484.87/533.90
  6. Step 6: Final answer
    x = 431.70

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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.