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Finding the Fourth Proportional to 940.45, 1,411.49 and 453.91

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Solution

The fourth proportional to 940.45, 1,411.49 and 453.91 is: 681.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.45 : 1,411.49 = 453.91 : x
  2. Step 2: Convert to fraction form
    940.45/1,411.49 = 453.91/x
  3. Step 3: Cross multiply
    940.45x = 1,411.49 × 453.91
  4. Step 4: Simplify right side
    940.45x = 640,692.95
  5. Step 5: Solve for x
    x = 640,692.95/940.45
  6. Step 6: Final answer
    x = 681.26

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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.