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Finding the Fourth Proportional to 432.81, 648.27 and 351.81

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Solution

The fourth proportional to 432.81, 648.27 and 351.81 is: 526.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.81 : 648.27 = 351.81 : x
  2. Step 2: Convert to fraction form
    432.81/648.27 = 351.81/x
  3. Step 3: Cross multiply
    432.81x = 648.27 × 351.81
  4. Step 4: Simplify right side
    432.81x = 228,067.87
  5. Step 5: Solve for x
    x = 228,067.87/432.81
  6. Step 6: Final answer
    x = 526.95

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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.