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Finding the Fourth Proportional to 745.82, 1,029.20 and 414.22

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Solution

The fourth proportional to 745.82, 1,029.20 and 414.22 is: 571.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.82 : 1,029.20 = 414.22 : x
  2. Step 2: Convert to fraction form
    745.82/1,029.20 = 414.22/x
  3. Step 3: Cross multiply
    745.82x = 1,029.20 × 414.22
  4. Step 4: Simplify right side
    745.82x = 426,314.71
  5. Step 5: Solve for x
    x = 426,314.71/745.82
  6. Step 6: Final answer
    x = 571.61

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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.