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Finding the Fourth Proportional to 490.32, 675.72 and 392.04

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Solution

The fourth proportional to 490.32, 675.72 and 392.04 is: 540.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.32 : 675.72 = 392.04 : x
  2. Step 2: Convert to fraction form
    490.32/675.72 = 392.04/x
  3. Step 3: Cross multiply
    490.32x = 675.72 × 392.04
  4. Step 4: Simplify right side
    490.32x = 264,909.27
  5. Step 5: Solve for x
    x = 264,909.27/490.32
  6. Step 6: Final answer
    x = 540.28

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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.