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Finding the Fourth Proportional to 773.74, 1,163.04 and 715.42

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Solution

The fourth proportional to 773.74, 1,163.04 and 715.42 is: 1,075.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.74 : 1,163.04 = 715.42 : x
  2. Step 2: Convert to fraction form
    773.74/1,163.04 = 715.42/x
  3. Step 3: Cross multiply
    773.74x = 1,163.04 × 715.42
  4. Step 4: Simplify right side
    773.74x = 832,062.08
  5. Step 5: Solve for x
    x = 832,062.08/773.74
  6. Step 6: Final answer
    x = 1,075.38

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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.