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Finding the Fourth Proportional to 449.71, 673.74 and 287.05

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Solution

The fourth proportional to 449.71, 673.74 and 287.05 is: 430.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.71 : 673.74 = 287.05 : x
  2. Step 2: Convert to fraction form
    449.71/673.74 = 287.05/x
  3. Step 3: Cross multiply
    449.71x = 673.74 × 287.05
  4. Step 4: Simplify right side
    449.71x = 193,397.07
  5. Step 5: Solve for x
    x = 193,397.07/449.71
  6. Step 6: Final answer
    x = 430.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.