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Finding the Fourth Proportional to 355.39, 533.08 and 124.28

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Solution

The fourth proportional to 355.39, 533.08 and 124.28 is: 186.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.39 : 533.08 = 124.28 : x
  2. Step 2: Convert to fraction form
    355.39/533.08 = 124.28/x
  3. Step 3: Cross multiply
    355.39x = 533.08 × 124.28
  4. Step 4: Simplify right side
    355.39x = 66,250.67
  5. Step 5: Solve for x
    x = 66,250.67/355.39
  6. Step 6: Final answer
    x = 186.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.