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Finding the Fourth Proportional to 637.09, 878.97 and 440.26

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Solution

The fourth proportional to 637.09, 878.97 and 440.26 is: 607.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.09 : 878.97 = 440.26 : x
  2. Step 2: Convert to fraction form
    637.09/878.97 = 440.26/x
  3. Step 3: Cross multiply
    637.09x = 878.97 × 440.26
  4. Step 4: Simplify right side
    637.09x = 386,975.33
  5. Step 5: Solve for x
    x = 386,975.33/637.09
  6. Step 6: Final answer
    x = 607.41

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Double scale
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1.5x scale

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.