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Finding the Fourth Proportional to 508.80, 764.48 and 451.84

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Solution

The fourth proportional to 508.80, 764.48 and 451.84 is: 678.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.80 : 764.48 = 451.84 : x
  2. Step 2: Convert to fraction form
    508.80/764.48 = 451.84/x
  3. Step 3: Cross multiply
    508.80x = 764.48 × 451.84
  4. Step 4: Simplify right side
    508.80x = 345,422.64
  5. Step 5: Solve for x
    x = 345,422.64/508.80
  6. Step 6: Final answer
    x = 678.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.