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Finding the Fourth Proportional to 348.18, 480.65 and 282.57

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Solution

The fourth proportional to 348.18, 480.65 and 282.57 is: 390.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.18 : 480.65 = 282.57 : x
  2. Step 2: Convert to fraction form
    348.18/480.65 = 282.57/x
  3. Step 3: Cross multiply
    348.18x = 480.65 × 282.57
  4. Step 4: Simplify right side
    348.18x = 135,817.27
  5. Step 5: Solve for x
    x = 135,817.27/348.18
  6. Step 6: Final answer
    x = 390.08

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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.