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Finding the Fourth Proportional to 449.02, 620.67 and 374.90

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Solution

The fourth proportional to 449.02, 620.67 and 374.90 is: 518.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.02 : 620.67 = 374.90 : x
  2. Step 2: Convert to fraction form
    449.02/620.67 = 374.90/x
  3. Step 3: Cross multiply
    449.02x = 620.67 × 374.90
  4. Step 4: Simplify right side
    449.02x = 232,689.18
  5. Step 5: Solve for x
    x = 232,689.18/449.02
  6. Step 6: Final answer
    x = 518.22

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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.