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Finding the Fourth Proportional to 626.51, 939.80 and 261.33

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Solution

The fourth proportional to 626.51, 939.80 and 261.33 is: 392.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.51 : 939.80 = 261.33 : x
  2. Step 2: Convert to fraction form
    626.51/939.80 = 261.33/x
  3. Step 3: Cross multiply
    626.51x = 939.80 × 261.33
  4. Step 4: Simplify right side
    626.51x = 245,596.63
  5. Step 5: Solve for x
    x = 245,596.63/626.51
  6. Step 6: Final answer
    x = 392.01

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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.