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Finding the Fourth Proportional to 745.44, 1,029.24 and 571.92

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Solution

The fourth proportional to 745.44, 1,029.24 and 571.92 is: 789.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.44 : 1,029.24 = 571.92 : x
  2. Step 2: Convert to fraction form
    745.44/1,029.24 = 571.92/x
  3. Step 3: Cross multiply
    745.44x = 1,029.24 × 571.92
  4. Step 4: Simplify right side
    745.44x = 588,642.94
  5. Step 5: Solve for x
    x = 588,642.94/745.44
  6. Step 6: Final answer
    x = 789.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.