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Finding the Fourth Proportional to 636.27, 953.61 and 289.51

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Solution

The fourth proportional to 636.27, 953.61 and 289.51 is: 433.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.27 : 953.61 = 289.51 : x
  2. Step 2: Convert to fraction form
    636.27/953.61 = 289.51/x
  3. Step 3: Cross multiply
    636.27x = 953.61 × 289.51
  4. Step 4: Simplify right side
    636.27x = 276,076.16
  5. Step 5: Solve for x
    x = 276,076.16/636.27
  6. Step 6: Final answer
    x = 433.90

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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.