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Finding the Fourth Proportional to 1,008.99, 1,512.23 and 764.82

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Solution

The fourth proportional to 1,008.99, 1,512.23 and 764.82 is: 1,146.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.99 : 1,512.23 = 764.82 : x
  2. Step 2: Convert to fraction form
    1,008.99/1,512.23 = 764.82/x
  3. Step 3: Cross multiply
    1,008.99x = 1,512.23 × 764.82
  4. Step 4: Simplify right side
    1,008.99x = 1,156,579.92
  5. Step 5: Solve for x
    x = 1,156,579.92/1,008.99
  6. Step 6: Final answer
    x = 1,146.27

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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.