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Finding the Fourth Proportional to 481.78, 719.18 and 423.39

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Solution

The fourth proportional to 481.78, 719.18 and 423.39 is: 632.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.78 : 719.18 = 423.39 : x
  2. Step 2: Convert to fraction form
    481.78/719.18 = 423.39/x
  3. Step 3: Cross multiply
    481.78x = 719.18 × 423.39
  4. Step 4: Simplify right side
    481.78x = 304,491.50
  5. Step 5: Solve for x
    x = 304,491.50/481.78
  6. Step 6: Final answer
    x = 632.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.