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Finding the Fourth Proportional to 395.51, 545.79 and 248.22

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Solution

The fourth proportional to 395.51, 545.79 and 248.22 is: 342.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.51 : 545.79 = 248.22 : x
  2. Step 2: Convert to fraction form
    395.51/545.79 = 248.22/x
  3. Step 3: Cross multiply
    395.51x = 545.79 × 248.22
  4. Step 4: Simplify right side
    395.51x = 135,475.99
  5. Step 5: Solve for x
    x = 135,475.99/395.51
  6. Step 6: Final answer
    x = 342.53

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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.