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Finding the Fourth Proportional to 479.22, 719.55 and 274.02

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Solution

The fourth proportional to 479.22, 719.55 and 274.02 is: 411.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.22 : 719.55 = 274.02 : x
  2. Step 2: Convert to fraction form
    479.22/719.55 = 274.02/x
  3. Step 3: Cross multiply
    479.22x = 719.55 × 274.02
  4. Step 4: Simplify right side
    479.22x = 197,171.09
  5. Step 5: Solve for x
    x = 197,171.09/479.22
  6. Step 6: Final answer
    x = 411.44

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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.