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Finding the Fourth Proportional to 258.15, 356.15 and 147.59

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Solution

The fourth proportional to 258.15, 356.15 and 147.59 is: 203.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.15 : 356.15 = 147.59 : x
  2. Step 2: Convert to fraction form
    258.15/356.15 = 147.59/x
  3. Step 3: Cross multiply
    258.15x = 356.15 × 147.59
  4. Step 4: Simplify right side
    258.15x = 52,562.77
  5. Step 5: Solve for x
    x = 52,562.77/258.15
  6. Step 6: Final answer
    x = 203.61

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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.