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Finding the Fourth Proportional to 294.21, 440.60 and 172.08

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Solution

The fourth proportional to 294.21, 440.60 and 172.08 is: 257.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.21 : 440.60 = 172.08 : x
  2. Step 2: Convert to fraction form
    294.21/440.60 = 172.08/x
  3. Step 3: Cross multiply
    294.21x = 440.60 × 172.08
  4. Step 4: Simplify right side
    294.21x = 75,817.59
  5. Step 5: Solve for x
    x = 75,817.59/294.21
  6. Step 6: Final answer
    x = 257.70

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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.