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Finding the Fourth Proportional to 395.02, 545.16 and 220.42

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Solution

The fourth proportional to 395.02, 545.16 and 220.42 is: 304.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.02 : 545.16 = 220.42 : x
  2. Step 2: Convert to fraction form
    395.02/545.16 = 220.42/x
  3. Step 3: Cross multiply
    395.02x = 545.16 × 220.42
  4. Step 4: Simplify right side
    395.02x = 120,164.17
  5. Step 5: Solve for x
    x = 120,164.17/395.02
  6. Step 6: Final answer
    x = 304.20

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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.