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Finding the Fourth Proportional to 392.64, 540.72 and 322.44

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Solution

The fourth proportional to 392.64, 540.72 and 322.44 is: 444.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.64 : 540.72 = 322.44 : x
  2. Step 2: Convert to fraction form
    392.64/540.72 = 322.44/x
  3. Step 3: Cross multiply
    392.64x = 540.72 × 322.44
  4. Step 4: Simplify right side
    392.64x = 174,349.76
  5. Step 5: Solve for x
    x = 174,349.76/392.64
  6. Step 6: Final answer
    x = 444.04

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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.