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Finding the Fourth Proportional to 368.16, 548.40 and 329.28

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Solution

The fourth proportional to 368.16, 548.40 and 329.28 is: 490.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.16 : 548.40 = 329.28 : x
  2. Step 2: Convert to fraction form
    368.16/548.40 = 329.28/x
  3. Step 3: Cross multiply
    368.16x = 548.40 × 329.28
  4. Step 4: Simplify right side
    368.16x = 180,577.15
  5. Step 5: Solve for x
    x = 180,577.15/368.16
  6. Step 6: Final answer
    x = 490.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.