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Finding the Fourth Proportional to 654.17, 979.73 and 328.75

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Solution

The fourth proportional to 654.17, 979.73 and 328.75 is: 492.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.17 : 979.73 = 328.75 : x
  2. Step 2: Convert to fraction form
    654.17/979.73 = 328.75/x
  3. Step 3: Cross multiply
    654.17x = 979.73 × 328.75
  4. Step 4: Simplify right side
    654.17x = 322,086.24
  5. Step 5: Solve for x
    x = 322,086.24/654.17
  6. Step 6: Final answer
    x = 492.36

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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.