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Finding the Fourth Proportional to 392.64, 540.24 and 383.04

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Solution

The fourth proportional to 392.64, 540.24 and 383.04 is: 527.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.64 : 540.24 = 383.04 : x
  2. Step 2: Convert to fraction form
    392.64/540.24 = 383.04/x
  3. Step 3: Cross multiply
    392.64x = 540.24 × 383.04
  4. Step 4: Simplify right side
    392.64x = 206,933.53
  5. Step 5: Solve for x
    x = 206,933.53/392.64
  6. Step 6: Final answer
    x = 527.03

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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.