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Finding the Fourth Proportional to 745.27, 1,028.26 and 465.79

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Solution

The fourth proportional to 745.27, 1,028.26 and 465.79 is: 642.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.27 : 1,028.26 = 465.79 : x
  2. Step 2: Convert to fraction form
    745.27/1,028.26 = 465.79/x
  3. Step 3: Cross multiply
    745.27x = 1,028.26 × 465.79
  4. Step 4: Simplify right side
    745.27x = 478,950.27
  5. Step 5: Solve for x
    x = 478,950.27/745.27
  6. Step 6: Final answer
    x = 642.66

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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.