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Finding the Fourth Proportional to 745.61, 1,028.96 and 414.03

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Solution

The fourth proportional to 745.61, 1,028.96 and 414.03 is: 571.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.61 : 1,028.96 = 414.03 : x
  2. Step 2: Convert to fraction form
    745.61/1,028.96 = 414.03/x
  3. Step 3: Cross multiply
    745.61x = 1,028.96 × 414.03
  4. Step 4: Simplify right side
    745.61x = 426,023.65
  5. Step 5: Solve for x
    x = 426,023.65/745.61
  6. Step 6: Final answer
    x = 571.38

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1.5x scale

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.