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Finding the Fourth Proportional to 481.36, 665.08 and 383.84

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Solution

The fourth proportional to 481.36, 665.08 and 383.84 is: 530.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.36 : 665.08 = 383.84 : x
  2. Step 2: Convert to fraction form
    481.36/665.08 = 383.84/x
  3. Step 3: Cross multiply
    481.36x = 665.08 × 383.84
  4. Step 4: Simplify right side
    481.36x = 255,284.31
  5. Step 5: Solve for x
    x = 255,284.31/481.36
  6. Step 6: Final answer
    x = 530.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.