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Finding the Fourth Proportional to 316.96, 437.40 and 192.64

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Solution

The fourth proportional to 316.96, 437.40 and 192.64 is: 265.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.96 : 437.40 = 192.64 : x
  2. Step 2: Convert to fraction form
    316.96/437.40 = 192.64/x
  3. Step 3: Cross multiply
    316.96x = 437.40 × 192.64
  4. Step 4: Simplify right side
    316.96x = 84,260.74
  5. Step 5: Solve for x
    x = 84,260.74/316.96
  6. Step 6: Final answer
    x = 265.84

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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.