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Finding the Fourth Proportional to 365.22, 545.09 and 316.62

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Solution

The fourth proportional to 365.22, 545.09 and 316.62 is: 472.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.22 : 545.09 = 316.62 : x
  2. Step 2: Convert to fraction form
    365.22/545.09 = 316.62/x
  3. Step 3: Cross multiply
    365.22x = 545.09 × 316.62
  4. Step 4: Simplify right side
    365.22x = 172,584.81
  5. Step 5: Solve for x
    x = 172,584.81/365.22
  6. Step 6: Final answer
    x = 472.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.