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Finding the Fourth Proportional to 644.01, 888.80 and 395.23

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Solution

The fourth proportional to 644.01, 888.80 and 395.23 is: 545.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.01 : 888.80 = 395.23 : x
  2. Step 2: Convert to fraction form
    644.01/888.80 = 395.23/x
  3. Step 3: Cross multiply
    644.01x = 888.80 × 395.23
  4. Step 4: Simplify right side
    644.01x = 351,280.42
  5. Step 5: Solve for x
    x = 351,280.42/644.01
  6. Step 6: Final answer
    x = 545.46

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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.