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Finding the Fourth Proportional to 438.77, 657.43 and 194.69

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Solution

The fourth proportional to 438.77, 657.43 and 194.69 is: 291.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.77 : 657.43 = 194.69 : x
  2. Step 2: Convert to fraction form
    438.77/657.43 = 194.69/x
  3. Step 3: Cross multiply
    438.77x = 657.43 × 194.69
  4. Step 4: Simplify right side
    438.77x = 127,995.05
  5. Step 5: Solve for x
    x = 127,995.05/438.77
  6. Step 6: Final answer
    x = 291.71

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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.