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Finding the Fourth Proportional to 909.31, 1,362.27 and 764.00

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Solution

The fourth proportional to 909.31, 1,362.27 and 764.00 is: 1,144.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.31 : 1,362.27 = 764.00 : x
  2. Step 2: Convert to fraction form
    909.31/1,362.27 = 764.00/x
  3. Step 3: Cross multiply
    909.31x = 1,362.27 × 764.00
  4. Step 4: Simplify right side
    909.31x = 1,040,771.14
  5. Step 5: Solve for x
    x = 1,040,771.14/909.31
  6. Step 6: Final answer
    x = 1,144.57

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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.