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Finding the Fourth Proportional to 636.67, 955.02 and 328.33

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Solution

The fourth proportional to 636.67, 955.02 and 328.33 is: 492.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.67 : 955.02 = 328.33 : x
  2. Step 2: Convert to fraction form
    636.67/955.02 = 328.33/x
  3. Step 3: Cross multiply
    636.67x = 955.02 × 328.33
  4. Step 4: Simplify right side
    636.67x = 313,564.14
  5. Step 5: Solve for x
    x = 313,564.14/636.67
  6. Step 6: Final answer
    x = 492.51

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1.5x scale

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.