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Finding the Fourth Proportional to 644.31, 883.82 and 607.05

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Solution

The fourth proportional to 644.31, 883.82 and 607.05 is: 832.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.31 : 883.82 = 607.05 : x
  2. Step 2: Convert to fraction form
    644.31/883.82 = 607.05/x
  3. Step 3: Cross multiply
    644.31x = 883.82 × 607.05
  4. Step 4: Simplify right side
    644.31x = 536,524.45
  5. Step 5: Solve for x
    x = 536,524.45/644.31
  6. Step 6: Final answer
    x = 832.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.