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Finding the Fourth Proportional to 326.60, 450.48 and 210.20

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Solution

The fourth proportional to 326.60, 450.48 and 210.20 is: 289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.60 : 450.48 = 210.20 : x
  2. Step 2: Convert to fraction form
    326.60/450.48 = 210.20/x
  3. Step 3: Cross multiply
    326.60x = 450.48 × 210.20
  4. Step 4: Simplify right side
    326.60x = 94,690.90
  5. Step 5: Solve for x
    x = 94,690.90/326.60
  6. Step 6: Final answer
    x = 289.93

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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.