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Finding the Fourth Proportional to 589.56, 813.27 and 490.47

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Solution

The fourth proportional to 589.56, 813.27 and 490.47 is: 676.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.56 : 813.27 = 490.47 : x
  2. Step 2: Convert to fraction form
    589.56/813.27 = 490.47/x
  3. Step 3: Cross multiply
    589.56x = 813.27 × 490.47
  4. Step 4: Simplify right side
    589.56x = 398,884.54
  5. Step 5: Solve for x
    x = 398,884.54/589.56
  6. Step 6: Final answer
    x = 676.58

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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.