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Finding the Fourth Proportional to 449.18, 673.50 and 287.06

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Solution

The fourth proportional to 449.18, 673.50 and 287.06 is: 430.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.18 : 673.50 = 287.06 : x
  2. Step 2: Convert to fraction form
    449.18/673.50 = 287.06/x
  3. Step 3: Cross multiply
    449.18x = 673.50 × 287.06
  4. Step 4: Simplify right side
    449.18x = 193,334.91
  5. Step 5: Solve for x
    x = 193,334.91/449.18
  6. Step 6: Final answer
    x = 430.42

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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.