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Finding the Fourth Proportional to 745.42, 1,028.82 and 434.92

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Solution

The fourth proportional to 745.42, 1,028.82 and 434.92 is: 600.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.42 : 1,028.82 = 434.92 : x
  2. Step 2: Convert to fraction form
    745.42/1,028.82 = 434.92/x
  3. Step 3: Cross multiply
    745.42x = 1,028.82 × 434.92
  4. Step 4: Simplify right side
    745.42x = 447,454.39
  5. Step 5: Solve for x
    x = 447,454.39/745.42
  6. Step 6: Final answer
    x = 600.27

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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.