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Finding the Fourth Proportional to 258.45, 356.69 and 147.93

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Solution

The fourth proportional to 258.45, 356.69 and 147.93 is: 204.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.45 : 356.69 = 147.93 : x
  2. Step 2: Convert to fraction form
    258.45/356.69 = 147.93/x
  3. Step 3: Cross multiply
    258.45x = 356.69 × 147.93
  4. Step 4: Simplify right side
    258.45x = 52,765.52
  5. Step 5: Solve for x
    x = 52,765.52/258.45
  6. Step 6: Final answer
    x = 204.16

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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.