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Finding the Fourth Proportional to 444.67, 613.79 and 421.45

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Solution

The fourth proportional to 444.67, 613.79 and 421.45 is: 581.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.67 : 613.79 = 421.45 : x
  2. Step 2: Convert to fraction form
    444.67/613.79 = 421.45/x
  3. Step 3: Cross multiply
    444.67x = 613.79 × 421.45
  4. Step 4: Simplify right side
    444.67x = 258,679.69
  5. Step 5: Solve for x
    x = 258,679.69/444.67
  6. Step 6: Final answer
    x = 581.73

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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.