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Finding the Fourth Proportional to 258.13, 356.15 and 147.56

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Solution

The fourth proportional to 258.13, 356.15 and 147.56 is: 203.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.13 : 356.15 = 147.56 : x
  2. Step 2: Convert to fraction form
    258.13/356.15 = 147.56/x
  3. Step 3: Cross multiply
    258.13x = 356.15 × 147.56
  4. Step 4: Simplify right side
    258.13x = 52,554.75
  5. Step 5: Solve for x
    x = 52,554.75/258.13
  6. Step 6: Final answer
    x = 203.60

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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.