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Finding the Fourth Proportional to 589.73, 811.96 and 449.40

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Solution

The fourth proportional to 589.73, 811.96 and 449.40 is: 618.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.73 : 811.96 = 449.40 : x
  2. Step 2: Convert to fraction form
    589.73/811.96 = 449.40/x
  3. Step 3: Cross multiply
    589.73x = 811.96 × 449.40
  4. Step 4: Simplify right side
    589.73x = 364,888.52
  5. Step 5: Solve for x
    x = 364,888.52/589.73
  6. Step 6: Final answer
    x = 618.74

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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.