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Finding the Fourth Proportional to 287.00, 395.88 and 231.87

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Solution

The fourth proportional to 287.00, 395.88 and 231.87 is: 319.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.00 : 395.88 = 231.87 : x
  2. Step 2: Convert to fraction form
    287.00/395.88 = 231.87/x
  3. Step 3: Cross multiply
    287.00x = 395.88 × 231.87
  4. Step 4: Simplify right side
    287.00x = 91,792.70
  5. Step 5: Solve for x
    x = 91,792.70/287.00
  6. Step 6: Final answer
    x = 319.84

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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.