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Finding the Fourth Proportional to 920.41, 1,380.61 and 372.97

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Solution

The fourth proportional to 920.41, 1,380.61 and 372.97 is: 559.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.41 : 1,380.61 = 372.97 : x
  2. Step 2: Convert to fraction form
    920.41/1,380.61 = 372.97/x
  3. Step 3: Cross multiply
    920.41x = 1,380.61 × 372.97
  4. Step 4: Simplify right side
    920.41x = 514,928.30
  5. Step 5: Solve for x
    x = 514,928.30/920.41
  6. Step 6: Final answer
    x = 559.46

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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.