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Finding the Fourth Proportional to 644.13, 888.76 and 364.31

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Solution

The fourth proportional to 644.13, 888.76 and 364.31 is: 502.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.13 : 888.76 = 364.31 : x
  2. Step 2: Convert to fraction form
    644.13/888.76 = 364.31/x
  3. Step 3: Cross multiply
    644.13x = 888.76 × 364.31
  4. Step 4: Simplify right side
    644.13x = 323,780.57
  5. Step 5: Solve for x
    x = 323,780.57/644.13
  6. Step 6: Final answer
    x = 502.66

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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.