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Finding the Fourth Proportional to 449.76, 620.79 and 263.32

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Solution

The fourth proportional to 449.76, 620.79 and 263.32 is: 363.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.76 : 620.79 = 263.32 : x
  2. Step 2: Convert to fraction form
    449.76/620.79 = 263.32/x
  3. Step 3: Cross multiply
    449.76x = 620.79 × 263.32
  4. Step 4: Simplify right side
    449.76x = 163,466.42
  5. Step 5: Solve for x
    x = 163,466.42/449.76
  6. Step 6: Final answer
    x = 363.45

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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.