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Finding the Fourth Proportional to 326, 491.72 and 322.22

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Solution

The fourth proportional to 326, 491.72 and 322.22 is: 486.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    326 : 491.72 = 322.22 : x
  2. Step 2: Convert to fraction form
    326/491.72 = 322.22/x
  3. Step 3: Cross multiply
    326x = 491.72 × 322.22
  4. Step 4: Simplify right side
    326x = 158,442.02
  5. Step 5: Solve for x
    x = 158,442.02/326
  6. Step 6: Final answer
    x = 486.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.