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Finding the Fourth Proportional to 175.68, 262 and 172.80

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Solution

The fourth proportional to 175.68, 262 and 172.80 is: 257.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.68 : 262 = 172.80 : x
  2. Step 2: Convert to fraction form
    175.68/262 = 172.80/x
  3. Step 3: Cross multiply
    175.68x = 262 × 172.80
  4. Step 4: Simplify right side
    175.68x = 45,273.60
  5. Step 5: Solve for x
    x = 45,273.60/175.68
  6. Step 6: Final answer
    x = 257.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.