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Finding the Fourth Proportional to 364.80, 503.36 and 320.96

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Solution

The fourth proportional to 364.80, 503.36 and 320.96 is: 442.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.80 : 503.36 = 320.96 : x
  2. Step 2: Convert to fraction form
    364.80/503.36 = 320.96/x
  3. Step 3: Cross multiply
    364.80x = 503.36 × 320.96
  4. Step 4: Simplify right side
    364.80x = 161,558.43
  5. Step 5: Solve for x
    x = 161,558.43/364.80
  6. Step 6: Final answer
    x = 442.87

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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.