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Finding the Fourth Proportional to 438.56, 657.81 and 164.63

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Solution

The fourth proportional to 438.56, 657.81 and 164.63 is: 246.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.56 : 657.81 = 164.63 : x
  2. Step 2: Convert to fraction form
    438.56/657.81 = 164.63/x
  3. Step 3: Cross multiply
    438.56x = 657.81 × 164.63
  4. Step 4: Simplify right side
    438.56x = 108,295.06
  5. Step 5: Solve for x
    x = 108,295.06/438.56
  6. Step 6: Final answer
    x = 246.93

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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.