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Finding the Fourth Proportional to 449.04, 672.74 and 256.26

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Solution

The fourth proportional to 449.04, 672.74 and 256.26 is: 383.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.04 : 672.74 = 256.26 : x
  2. Step 2: Convert to fraction form
    449.04/672.74 = 256.26/x
  3. Step 3: Cross multiply
    449.04x = 672.74 × 256.26
  4. Step 4: Simplify right side
    449.04x = 172,396.35
  5. Step 5: Solve for x
    x = 172,396.35/449.04
  6. Step 6: Final answer
    x = 383.92

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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.