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Finding the Fourth Proportional to 920.24, 1,380.49 and 433.34

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Solution

The fourth proportional to 920.24, 1,380.49 and 433.34 is: 650.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.24 : 1,380.49 = 433.34 : x
  2. Step 2: Convert to fraction form
    920.24/1,380.49 = 433.34/x
  3. Step 3: Cross multiply
    920.24x = 1,380.49 × 433.34
  4. Step 4: Simplify right side
    920.24x = 598,221.54
  5. Step 5: Solve for x
    x = 598,221.54/920.24
  6. Step 6: Final answer
    x = 650.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.