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Finding the Fourth Proportional to 589.50, 813.14 and 449.38

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Solution

The fourth proportional to 589.50, 813.14 and 449.38 is: 619.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.50 : 813.14 = 449.38 : x
  2. Step 2: Convert to fraction form
    589.50/813.14 = 449.38/x
  3. Step 3: Cross multiply
    589.50x = 813.14 × 449.38
  4. Step 4: Simplify right side
    589.50x = 365,408.85
  5. Step 5: Solve for x
    x = 365,408.85/589.50
  6. Step 6: Final answer
    x = 619.86

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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.