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Finding the Fourth Proportional to 208.24, 287.44 and 130.64

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Solution

The fourth proportional to 208.24, 287.44 and 130.64 is: 180.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.24 : 287.44 = 130.64 : x
  2. Step 2: Convert to fraction form
    208.24/287.44 = 130.64/x
  3. Step 3: Cross multiply
    208.24x = 287.44 × 130.64
  4. Step 4: Simplify right side
    208.24x = 37,551.16
  5. Step 5: Solve for x
    x = 37,551.16/208.24
  6. Step 6: Final answer
    x = 180.33

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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.