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Finding the Fourth Proportional to 218.04, 326.55 and 172.02

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Solution

The fourth proportional to 218.04, 326.55 and 172.02 is: 257.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.04 : 326.55 = 172.02 : x
  2. Step 2: Convert to fraction form
    218.04/326.55 = 172.02/x
  3. Step 3: Cross multiply
    218.04x = 326.55 × 172.02
  4. Step 4: Simplify right side
    218.04x = 56,173.13
  5. Step 5: Solve for x
    x = 56,173.13/218.04
  6. Step 6: Final answer
    x = 257.63

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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.