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Finding the Fourth Proportional to 432.35, 648.39 and 188.63

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Solution

The fourth proportional to 432.35, 648.39 and 188.63 is: 282.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.35 : 648.39 = 188.63 : x
  2. Step 2: Convert to fraction form
    432.35/648.39 = 188.63/x
  3. Step 3: Cross multiply
    432.35x = 648.39 × 188.63
  4. Step 4: Simplify right side
    432.35x = 122,303.24
  5. Step 5: Solve for x
    x = 122,303.24/432.35
  6. Step 6: Final answer
    x = 282.88

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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.