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Finding the Fourth Proportional to 348.28, 480.18 and 282.64

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Solution

The fourth proportional to 348.28, 480.18 and 282.64 is: 389.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.28 : 480.18 = 282.64 : x
  2. Step 2: Convert to fraction form
    348.28/480.18 = 282.64/x
  3. Step 3: Cross multiply
    348.28x = 480.18 × 282.64
  4. Step 4: Simplify right side
    348.28x = 135,718.08
  5. Step 5: Solve for x
    x = 135,718.08/348.28
  6. Step 6: Final answer
    x = 389.68

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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.