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Finding the Fourth Proportional to 259.27, 357.78 and 148.74

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Solution

The fourth proportional to 259.27, 357.78 and 148.74 is: 205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.27 : 357.78 = 148.74 : x
  2. Step 2: Convert to fraction form
    259.27/357.78 = 148.74/x
  3. Step 3: Cross multiply
    259.27x = 357.78 × 148.74
  4. Step 4: Simplify right side
    259.27x = 53,215.41
  5. Step 5: Solve for x
    x = 53,215.41/259.27
  6. Step 6: Final answer
    x = 205.25

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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.