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Finding the Fourth Proportional to 479.54, 719.28 and 449.48

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Solution

The fourth proportional to 479.54, 719.28 and 449.48 is: 674.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.54 : 719.28 = 449.48 : x
  2. Step 2: Convert to fraction form
    479.54/719.28 = 449.48/x
  3. Step 3: Cross multiply
    479.54x = 719.28 × 449.48
  4. Step 4: Simplify right side
    479.54x = 323,298.38
  5. Step 5: Solve for x
    x = 323,298.38/479.54
  6. Step 6: Final answer
    x = 674.19

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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.