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Finding the Fourth Proportional to 533.47, 736.20 and 312.43

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Solution

The fourth proportional to 533.47, 736.20 and 312.43 is: 431.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.47 : 736.20 = 312.43 : x
  2. Step 2: Convert to fraction form
    533.47/736.20 = 312.43/x
  3. Step 3: Cross multiply
    533.47x = 736.20 × 312.43
  4. Step 4: Simplify right side
    533.47x = 230,009.13
  5. Step 5: Solve for x
    x = 230,009.13/533.47
  6. Step 6: Final answer
    x = 431.16

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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.