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Finding the Fourth Proportional to 253.13, 348.72 and 208.58

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Solution

The fourth proportional to 253.13, 348.72 and 208.58 is: 287.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.13 : 348.72 = 208.58 : x
  2. Step 2: Convert to fraction form
    253.13/348.72 = 208.58/x
  3. Step 3: Cross multiply
    253.13x = 348.72 × 208.58
  4. Step 4: Simplify right side
    253.13x = 72,736.02
  5. Step 5: Solve for x
    x = 72,736.02/253.13
  6. Step 6: Final answer
    x = 287.35

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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.