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Finding the Fourth Proportional to 395.16, 545.62 and 247.84

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Solution

The fourth proportional to 395.16, 545.62 and 247.84 is: 342.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.16 : 545.62 = 247.84 : x
  2. Step 2: Convert to fraction form
    395.16/545.62 = 247.84/x
  3. Step 3: Cross multiply
    395.16x = 545.62 × 247.84
  4. Step 4: Simplify right side
    395.16x = 135,226.46
  5. Step 5: Solve for x
    x = 135,226.46/395.16
  6. Step 6: Final answer
    x = 342.21

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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.