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Finding the Fourth Proportional to 449.58, 672.91 and 243.64

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Solution

The fourth proportional to 449.58, 672.91 and 243.64 is: 364.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.58 : 672.91 = 243.64 : x
  2. Step 2: Convert to fraction form
    449.58/672.91 = 243.64/x
  3. Step 3: Cross multiply
    449.58x = 672.91 × 243.64
  4. Step 4: Simplify right side
    449.58x = 163,948.02
  5. Step 5: Solve for x
    x = 163,948.02/449.58
  6. Step 6: Final answer
    x = 364.67

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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.