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Finding the Fourth Proportional to 320.32, 441.99 and 292.64

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Solution

The fourth proportional to 320.32, 441.99 and 292.64 is: 403.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.32 : 441.99 = 292.64 : x
  2. Step 2: Convert to fraction form
    320.32/441.99 = 292.64/x
  3. Step 3: Cross multiply
    320.32x = 441.99 × 292.64
  4. Step 4: Simplify right side
    320.32x = 129,343.95
  5. Step 5: Solve for x
    x = 129,343.95/320.32
  6. Step 6: Final answer
    x = 403.80

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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.