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Finding the Fourth Proportional to 259.31, 386.65 and 248.51

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Solution

The fourth proportional to 259.31, 386.65 and 248.51 is: 370.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.31 : 386.65 = 248.51 : x
  2. Step 2: Convert to fraction form
    259.31/386.65 = 248.51/x
  3. Step 3: Cross multiply
    259.31x = 386.65 × 248.51
  4. Step 4: Simplify right side
    259.31x = 96,086.39
  5. Step 5: Solve for x
    x = 96,086.39/259.31
  6. Step 6: Final answer
    x = 370.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.