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Finding the Fourth Proportional to 2,920.57, 4,380.42 and 945.95

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Solution

The fourth proportional to 2,920.57, 4,380.42 and 945.95 is: 1,418.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.57 : 4,380.42 = 945.95 : x
  2. Step 2: Convert to fraction form
    2,920.57/4,380.42 = 945.95/x
  3. Step 3: Cross multiply
    2,920.57x = 4,380.42 × 945.95
  4. Step 4: Simplify right side
    2,920.57x = 4,143,636.40
  5. Step 5: Solve for x
    x = 4,143,636.40/2,920.57
  6. Step 6: Final answer
    x = 1,418.78

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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.