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Finding the Fourth Proportional to 365.91, 505.93 and 319.80

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Solution

The fourth proportional to 365.91, 505.93 and 319.80 is: 442.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.91 : 505.93 = 319.80 : x
  2. Step 2: Convert to fraction form
    365.91/505.93 = 319.80/x
  3. Step 3: Cross multiply
    365.91x = 505.93 × 319.80
  4. Step 4: Simplify right side
    365.91x = 161,797.21
  5. Step 5: Solve for x
    x = 161,797.21/365.91
  6. Step 6: Final answer
    x = 442.17

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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.