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Finding the Fourth Proportional to 248.58, 342.98 and 149.00

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Solution

The fourth proportional to 248.58, 342.98 and 149.00 is: 205.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.58 : 342.98 = 149.00 : x
  2. Step 2: Convert to fraction form
    248.58/342.98 = 149.00/x
  3. Step 3: Cross multiply
    248.58x = 342.98 × 149.00
  4. Step 4: Simplify right side
    248.58x = 51,101.56
  5. Step 5: Solve for x
    x = 51,101.56/248.58
  6. Step 6: Final answer
    x = 205.57

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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.