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Finding the Fourth Proportional to 252.40, 348.06 and 208.60

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Solution

The fourth proportional to 252.40, 348.06 and 208.60 is: 287.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.40 : 348.06 = 208.60 : x
  2. Step 2: Convert to fraction form
    252.40/348.06 = 208.60/x
  3. Step 3: Cross multiply
    252.40x = 348.06 × 208.60
  4. Step 4: Simplify right side
    252.40x = 72,605.32
  5. Step 5: Solve for x
    x = 72,605.32/252.40
  6. Step 6: Final answer
    x = 287.66

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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.