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Finding the Fourth Proportional to 644.28, 888.36 and 452.16

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Solution

The fourth proportional to 644.28, 888.36 and 452.16 is: 623.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.28 : 888.36 = 452.16 : x
  2. Step 2: Convert to fraction form
    644.28/888.36 = 452.16/x
  3. Step 3: Cross multiply
    644.28x = 888.36 × 452.16
  4. Step 4: Simplify right side
    644.28x = 401,680.86
  5. Step 5: Solve for x
    x = 401,680.86/644.28
  6. Step 6: Final answer
    x = 623.46

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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.