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Finding the Fourth Proportional to 395.60, 545.93 and 229.91

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Solution

The fourth proportional to 395.60, 545.93 and 229.91 is: 317.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.60 : 545.93 = 229.91 : x
  2. Step 2: Convert to fraction form
    395.60/545.93 = 229.91/x
  3. Step 3: Cross multiply
    395.60x = 545.93 × 229.91
  4. Step 4: Simplify right side
    395.60x = 125,514.98
  5. Step 5: Solve for x
    x = 125,514.98/395.60
  6. Step 6: Final answer
    x = 317.28

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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.