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Finding the Fourth Proportional to 176.40, 244.80 and 172.80

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Solution

The fourth proportional to 176.40, 244.80 and 172.80 is: 239.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.40 : 244.80 = 172.80 : x
  2. Step 2: Convert to fraction form
    176.40/244.80 = 172.80/x
  3. Step 3: Cross multiply
    176.40x = 244.80 × 172.80
  4. Step 4: Simplify right side
    176.40x = 42,301.44
  5. Step 5: Solve for x
    x = 42,301.44/176.40
  6. Step 6: Final answer
    x = 239.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.