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Finding the Fourth Proportional to 764.94, 1,147.86 and 716.96

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Solution

The fourth proportional to 764.94, 1,147.86 and 716.96 is: 1,075.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.94 : 1,147.86 = 716.96 : x
  2. Step 2: Convert to fraction form
    764.94/1,147.86 = 716.96/x
  3. Step 3: Cross multiply
    764.94x = 1,147.86 × 716.96
  4. Step 4: Simplify right side
    764.94x = 822,969.71
  5. Step 5: Solve for x
    x = 822,969.71/764.94
  6. Step 6: Final answer
    x = 1,075.86

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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.