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Finding the Fourth Proportional to 270.72, 373.68 and 172.74

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Solution

The fourth proportional to 270.72, 373.68 and 172.74 is: 238.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.72 : 373.68 = 172.74 : x
  2. Step 2: Convert to fraction form
    270.72/373.68 = 172.74/x
  3. Step 3: Cross multiply
    270.72x = 373.68 × 172.74
  4. Step 4: Simplify right side
    270.72x = 64,549.48
  5. Step 5: Solve for x
    x = 64,549.48/270.72
  6. Step 6: Final answer
    x = 238.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.