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Finding the Fourth Proportional to 364.69, 547.20 and 172.30

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Solution

The fourth proportional to 364.69, 547.20 and 172.30 is: 258.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.69 : 547.20 = 172.30 : x
  2. Step 2: Convert to fraction form
    364.69/547.20 = 172.30/x
  3. Step 3: Cross multiply
    364.69x = 547.20 × 172.30
  4. Step 4: Simplify right side
    364.69x = 94,282.56
  5. Step 5: Solve for x
    x = 94,282.56/364.69
  6. Step 6: Final answer
    x = 258.53

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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.