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Finding the Fourth Proportional to 745.67, 1,028.95 and 414.06

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Solution

The fourth proportional to 745.67, 1,028.95 and 414.06 is: 571.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.67 : 1,028.95 = 414.06 : x
  2. Step 2: Convert to fraction form
    745.67/1,028.95 = 414.06/x
  3. Step 3: Cross multiply
    745.67x = 1,028.95 × 414.06
  4. Step 4: Simplify right side
    745.67x = 426,047.04
  5. Step 5: Solve for x
    x = 426,047.04/745.67
  6. Step 6: Final answer
    x = 571.36

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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.