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Finding the Fourth Proportional to 287.21, 395.03 and 267.77

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Solution

The fourth proportional to 287.21, 395.03 and 267.77 is: 368.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.21 : 395.03 = 267.77 : x
  2. Step 2: Convert to fraction form
    287.21/395.03 = 267.77/x
  3. Step 3: Cross multiply
    287.21x = 395.03 × 267.77
  4. Step 4: Simplify right side
    287.21x = 105,775.84
  5. Step 5: Solve for x
    x = 105,775.84/287.21
  6. Step 6: Final answer
    x = 368.29

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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.