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Finding the Fourth Proportional to 644.26, 888.79 and 434.37

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Solution

The fourth proportional to 644.26, 888.79 and 434.37 is: 599.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.26 : 888.79 = 434.37 : x
  2. Step 2: Convert to fraction form
    644.26/888.79 = 434.37/x
  3. Step 3: Cross multiply
    644.26x = 888.79 × 434.37
  4. Step 4: Simplify right side
    644.26x = 386,061.77
  5. Step 5: Solve for x
    x = 386,061.77/644.26
  6. Step 6: Final answer
    x = 599.23

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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.