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Finding the Fourth Proportional to 258.86, 356.50 and 253.19

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Solution

The fourth proportional to 258.86, 356.50 and 253.19 is: 348.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.86 : 356.50 = 253.19 : x
  2. Step 2: Convert to fraction form
    258.86/356.50 = 253.19/x
  3. Step 3: Cross multiply
    258.86x = 356.50 × 253.19
  4. Step 4: Simplify right side
    258.86x = 90,263.44
  5. Step 5: Solve for x
    x = 90,263.44/258.86
  6. Step 6: Final answer
    x = 348.69

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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.