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Finding the Fourth Proportional to 490.86, 736.30 and 216.90

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Solution

The fourth proportional to 490.86, 736.30 and 216.90 is: 325.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.86 : 736.30 = 216.90 : x
  2. Step 2: Convert to fraction form
    490.86/736.30 = 216.90/x
  3. Step 3: Cross multiply
    490.86x = 736.30 × 216.90
  4. Step 4: Simplify right side
    490.86x = 159,703.47
  5. Step 5: Solve for x
    x = 159,703.47/490.86
  6. Step 6: Final answer
    x = 325.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.