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Finding the Fourth Proportional to 449.51, 620.61 and 325.58

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Solution

The fourth proportional to 449.51, 620.61 and 325.58 is: 449.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.51 : 620.61 = 325.58 : x
  2. Step 2: Convert to fraction form
    449.51/620.61 = 325.58/x
  3. Step 3: Cross multiply
    449.51x = 620.61 × 325.58
  4. Step 4: Simplify right side
    449.51x = 202,058.20
  5. Step 5: Solve for x
    x = 202,058.20/449.51
  6. Step 6: Final answer
    x = 449.51

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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.