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Finding the Fourth Proportional to 312.38, 468.32 and 173.55

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Solution

The fourth proportional to 312.38, 468.32 and 173.55 is: 260.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.38 : 468.32 = 173.55 : x
  2. Step 2: Convert to fraction form
    312.38/468.32 = 173.55/x
  3. Step 3: Cross multiply
    312.38x = 468.32 × 173.55
  4. Step 4: Simplify right side
    312.38x = 81,276.07
  5. Step 5: Solve for x
    x = 81,276.07/312.38
  6. Step 6: Final answer
    x = 260.18

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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.