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Finding the Fourth Proportional to 253.77, 349.72 and 206.99

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Solution

The fourth proportional to 253.77, 349.72 and 206.99 is: 285.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.77 : 349.72 = 206.99 : x
  2. Step 2: Convert to fraction form
    253.77/349.72 = 206.99/x
  3. Step 3: Cross multiply
    253.77x = 349.72 × 206.99
  4. Step 4: Simplify right side
    253.77x = 72,387.59
  5. Step 5: Solve for x
    x = 72,387.59/253.77
  6. Step 6: Final answer
    x = 285.25

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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.