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Finding the Fourth Proportional to 355.81, 533.65 and 124.87

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Solution

The fourth proportional to 355.81, 533.65 and 124.87 is: 187.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.81 : 533.65 = 124.87 : x
  2. Step 2: Convert to fraction form
    355.81/533.65 = 124.87/x
  3. Step 3: Cross multiply
    355.81x = 533.65 × 124.87
  4. Step 4: Simplify right side
    355.81x = 66,636.88
  5. Step 5: Solve for x
    x = 66,636.88/355.81
  6. Step 6: Final answer
    x = 187.28

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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.