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Finding the Fourth Proportional to 369.12, 553.74 and 171.35

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Solution

The fourth proportional to 369.12, 553.74 and 171.35 is: 257.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.12 : 553.74 = 171.35 : x
  2. Step 2: Convert to fraction form
    369.12/553.74 = 171.35/x
  3. Step 3: Cross multiply
    369.12x = 553.74 × 171.35
  4. Step 4: Simplify right side
    369.12x = 94,882.01
  5. Step 5: Solve for x
    x = 94,882.01/369.12
  6. Step 6: Final answer
    x = 257.05

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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.