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Finding the Fourth Proportional to 208.37, 286.79 and 153.02

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Solution

The fourth proportional to 208.37, 286.79 and 153.02 is: 210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.37 : 286.79 = 153.02 : x
  2. Step 2: Convert to fraction form
    208.37/286.79 = 153.02/x
  3. Step 3: Cross multiply
    208.37x = 286.79 × 153.02
  4. Step 4: Simplify right side
    208.37x = 43,882.41
  5. Step 5: Solve for x
    x = 43,882.41/208.37
  6. Step 6: Final answer
    x = 210.60

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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.