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Finding the Fourth Proportional to 533.31, 740.36 and 518.28

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Solution

The fourth proportional to 533.31, 740.36 and 518.28 is: 719.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.31 : 740.36 = 518.28 : x
  2. Step 2: Convert to fraction form
    533.31/740.36 = 518.28/x
  3. Step 3: Cross multiply
    533.31x = 740.36 × 518.28
  4. Step 4: Simplify right side
    533.31x = 383,711.19
  5. Step 5: Solve for x
    x = 383,711.19/533.31
  6. Step 6: Final answer
    x = 719.49

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.