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Finding the Fourth Proportional to 401.64, 601.65 and 329.28

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Solution

The fourth proportional to 401.64, 601.65 and 329.28 is: 493.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.64 : 601.65 = 329.28 : x
  2. Step 2: Convert to fraction form
    401.64/601.65 = 329.28/x
  3. Step 3: Cross multiply
    401.64x = 601.65 × 329.28
  4. Step 4: Simplify right side
    401.64x = 198,111.31
  5. Step 5: Solve for x
    x = 198,111.31/401.64
  6. Step 6: Final answer
    x = 493.26

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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.