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Finding the Fourth Proportional to 320.36, 480.96 and 279.18

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Solution

The fourth proportional to 320.36, 480.96 and 279.18 is: 419.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.36 : 480.96 = 279.18 : x
  2. Step 2: Convert to fraction form
    320.36/480.96 = 279.18/x
  3. Step 3: Cross multiply
    320.36x = 480.96 × 279.18
  4. Step 4: Simplify right side
    320.36x = 134,274.41
  5. Step 5: Solve for x
    x = 134,274.41/320.36
  6. Step 6: Final answer
    x = 419.14

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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.