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Finding the Fourth Proportional to 348.49, 480.90 and 208.70

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Solution

The fourth proportional to 348.49, 480.90 and 208.70 is: 288.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.49 : 480.90 = 208.70 : x
  2. Step 2: Convert to fraction form
    348.49/480.90 = 208.70/x
  3. Step 3: Cross multiply
    348.49x = 480.90 × 208.70
  4. Step 4: Simplify right side
    348.49x = 100,363.83
  5. Step 5: Solve for x
    x = 100,363.83/348.49
  6. Step 6: Final answer
    x = 288.00

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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.