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Finding the Fourth Proportional to 836.21, 1,254.32 and 288.54

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Solution

The fourth proportional to 836.21, 1,254.32 and 288.54 is: 432.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.21 : 1,254.32 = 288.54 : x
  2. Step 2: Convert to fraction form
    836.21/1,254.32 = 288.54/x
  3. Step 3: Cross multiply
    836.21x = 1,254.32 × 288.54
  4. Step 4: Simplify right side
    836.21x = 361,920.05
  5. Step 5: Solve for x
    x = 361,920.05/836.21
  6. Step 6: Final answer
    x = 432.81

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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.