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Finding the Fourth Proportional to 258.58, 356.89 and 202.46

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Solution

The fourth proportional to 258.58, 356.89 and 202.46 is: 279.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.58 : 356.89 = 202.46 : x
  2. Step 2: Convert to fraction form
    258.58/356.89 = 202.46/x
  3. Step 3: Cross multiply
    258.58x = 356.89 × 202.46
  4. Step 4: Simplify right side
    258.58x = 72,254.16
  5. Step 5: Solve for x
    x = 72,254.16/258.58
  6. Step 6: Final answer
    x = 279.43

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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.