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Finding the Fourth Proportional to 638.63, 957.71 and 273.45

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Solution

The fourth proportional to 638.63, 957.71 and 273.45 is: 410.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.63 : 957.71 = 273.45 : x
  2. Step 2: Convert to fraction form
    638.63/957.71 = 273.45/x
  3. Step 3: Cross multiply
    638.63x = 957.71 × 273.45
  4. Step 4: Simplify right side
    638.63x = 261,884.43
  5. Step 5: Solve for x
    x = 261,884.43/638.63
  6. Step 6: Final answer
    x = 410.08

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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.