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Finding the Fourth Proportional to 438.69, 657.61 and 195.49

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Solution

The fourth proportional to 438.69, 657.61 and 195.49 is: 293.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.69 : 657.61 = 195.49 : x
  2. Step 2: Convert to fraction form
    438.69/657.61 = 195.49/x
  3. Step 3: Cross multiply
    438.69x = 657.61 × 195.49
  4. Step 4: Simplify right side
    438.69x = 128,556.18
  5. Step 5: Solve for x
    x = 128,556.18/438.69
  6. Step 6: Final answer
    x = 293.05

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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.