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Finding the Fourth Proportional to 320.88, 480.60 and 272.34

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Solution

The fourth proportional to 320.88, 480.60 and 272.34 is: 407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.88 : 480.60 = 272.34 : x
  2. Step 2: Convert to fraction form
    320.88/480.60 = 272.34/x
  3. Step 3: Cross multiply
    320.88x = 480.60 × 272.34
  4. Step 4: Simplify right side
    320.88x = 130,886.60
  5. Step 5: Solve for x
    x = 130,886.60/320.88
  6. Step 6: Final answer
    x = 407.90

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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.