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Finding the Fourth Proportional to 664.18, 995.72 and 432.52

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Solution

The fourth proportional to 664.18, 995.72 and 432.52 is: 648.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.18 : 995.72 = 432.52 : x
  2. Step 2: Convert to fraction form
    664.18/995.72 = 432.52/x
  3. Step 3: Cross multiply
    664.18x = 995.72 × 432.52
  4. Step 4: Simplify right side
    664.18x = 430,668.81
  5. Step 5: Solve for x
    x = 430,668.81/664.18
  6. Step 6: Final answer
    x = 648.42

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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.