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Finding the Fourth Proportional to 644.51, 961.72 and 605.34

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Solution

The fourth proportional to 644.51, 961.72 and 605.34 is: 903.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.51 : 961.72 = 605.34 : x
  2. Step 2: Convert to fraction form
    644.51/961.72 = 605.34/x
  3. Step 3: Cross multiply
    644.51x = 961.72 × 605.34
  4. Step 4: Simplify right side
    644.51x = 582,166.07
  5. Step 5: Solve for x
    x = 582,166.07/644.51
  6. Step 6: Final answer
    x = 903.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.