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Finding the Fourth Proportional to 395.30, 545.80 and 302.54

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Solution

The fourth proportional to 395.30, 545.80 and 302.54 is: 417.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.30 : 545.80 = 302.54 : x
  2. Step 2: Convert to fraction form
    395.30/545.80 = 302.54/x
  3. Step 3: Cross multiply
    395.30x = 545.80 × 302.54
  4. Step 4: Simplify right side
    395.30x = 165,126.94
  5. Step 5: Solve for x
    x = 165,126.94/395.30
  6. Step 6: Final answer
    x = 417.72

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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.