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Finding the Fourth Proportional to 764.65, 1,147.11 and 277.59

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Solution

The fourth proportional to 764.65, 1,147.11 and 277.59 is: 416.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.65 : 1,147.11 = 277.59 : x
  2. Step 2: Convert to fraction form
    764.65/1,147.11 = 277.59/x
  3. Step 3: Cross multiply
    764.65x = 1,147.11 × 277.59
  4. Step 4: Simplify right side
    764.65x = 318,426.26
  5. Step 5: Solve for x
    x = 318,426.26/764.65
  6. Step 6: Final answer
    x = 416.43

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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.