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Finding the Fourth Proportional to 272.02, 407.76 and 109.54

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Solution

The fourth proportional to 272.02, 407.76 and 109.54 is: 164.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.02 : 407.76 = 109.54 : x
  2. Step 2: Convert to fraction form
    272.02/407.76 = 109.54/x
  3. Step 3: Cross multiply
    272.02x = 407.76 × 109.54
  4. Step 4: Simplify right side
    272.02x = 44,666.03
  5. Step 5: Solve for x
    x = 44,666.03/272.02
  6. Step 6: Final answer
    x = 164.20

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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.