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Finding the Fourth Proportional to 451.36, 678.08 and 245.87

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Solution

The fourth proportional to 451.36, 678.08 and 245.87 is: 369.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.36 : 678.08 = 245.87 : x
  2. Step 2: Convert to fraction form
    451.36/678.08 = 245.87/x
  3. Step 3: Cross multiply
    451.36x = 678.08 × 245.87
  4. Step 4: Simplify right side
    451.36x = 166,719.53
  5. Step 5: Solve for x
    x = 166,719.53/451.36
  6. Step 6: Final answer
    x = 369.37

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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.