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Finding the Fourth Proportional to 281.21, 387.83 and 202.37

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Solution

The fourth proportional to 281.21, 387.83 and 202.37 is: 279.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.21 : 387.83 = 202.37 : x
  2. Step 2: Convert to fraction form
    281.21/387.83 = 202.37/x
  3. Step 3: Cross multiply
    281.21x = 387.83 × 202.37
  4. Step 4: Simplify right side
    281.21x = 78,483.72
  5. Step 5: Solve for x
    x = 78,483.72/281.21
  6. Step 6: Final answer
    x = 279.10

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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.