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Finding the Fourth Proportional to 208.07, 287.13 and 114.81

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Solution

The fourth proportional to 208.07, 287.13 and 114.81 is: 158.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.07 : 287.13 = 114.81 : x
  2. Step 2: Convert to fraction form
    208.07/287.13 = 114.81/x
  3. Step 3: Cross multiply
    208.07x = 287.13 × 114.81
  4. Step 4: Simplify right side
    208.07x = 32,965.40
  5. Step 5: Solve for x
    x = 32,965.40/208.07
  6. Step 6: Final answer
    x = 158.44

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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.