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Finding the Fourth Proportional to 449.51, 620.28 and 253.05

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Solution

The fourth proportional to 449.51, 620.28 and 253.05 is: 349.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.51 : 620.28 = 253.05 : x
  2. Step 2: Convert to fraction form
    449.51/620.28 = 253.05/x
  3. Step 3: Cross multiply
    449.51x = 620.28 × 253.05
  4. Step 4: Simplify right side
    449.51x = 156,961.85
  5. Step 5: Solve for x
    x = 156,961.85/449.51
  6. Step 6: Final answer
    x = 349.19

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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.